This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Mathematics > Triangles > Class 10 Maths Chapter 6 Triangles – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Maths Chapter 6 Triangles Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. True or FalseAn obtuse triangle has 1 obtuse angle. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. What is a triangle that contains one of the angle 90$^{0}$ called? A) Acute triangle. B) Right triangle. C) Obtuse triangle. D) None of the above. Show Answer Correct Answer: B) Right triangle. 3. An isosceles triangle always has: A) Two equal angles. B) Three equal angles. C) All angles different. D) All angles obtuse. Show Answer Correct Answer: A) Two equal angles. 4. Can a triangle have sides with the given lengths?3 in, 6 in, 2 in A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 5. A triangle ABC, AB = 7.8 cm, AC= 7 cm and BC = 6 cm is ..... A) Isosceles Triangle. B) Scalene triangle. C) Equilateral triangle. D) Right angled Triangle. Show Answer Correct Answer: B) Scalene triangle. 6. An equiangular triangle has ..... A) No congruent angles. B) All congruent angles. C) Two congruent angles. D) None of the above. Show Answer Correct Answer: B) All congruent angles. 7. What type of triangle has 2 congruent sides? A) Exterior Angle Theorem. B) Isosceles. C) Scalene. D) Equilateral. Show Answer Correct Answer: B) Isosceles. 8. The sum of the squares of the sides of a rhombus is equal to ..... ? A) The sum of its diagonals. B) The sum of thesquares of its diagonals. C) Product of its diagonals. D) Sum of its sides and its diagonals. Show Answer Correct Answer: B) The sum of thesquares of its diagonals. 9. The incentre of a triangle is the point where: A) Angle bisectors meet. B) Altitudes meet. C) Perpendicular bisectors meet. D) Medians meet. Show Answer Correct Answer: A) Angle bisectors meet. 10. If the scale factor is less than one, the new figure will be A) An enlargement. B) A reduction. C) A scale factor. D) None of the above. Show Answer Correct Answer: B) A reduction. 11. All squares are ..... ? A) Equal. B) Similar. C) Congruent. D) None of the above. Show Answer Correct Answer: B) Similar. 12. Sandra is trying to make a flag out of fabric for her fashion class. She wants two of the angles to be 32 degrees and 64 degrees. What will the third angle need to be? A) 96. B) 264. C) 32. D) 84. Show Answer Correct Answer: D) 84. 13. What is the sum of the angles inside a triangle? A) 90. B) 180. C) 360. D) None of the above. Show Answer Correct Answer: B) 180. 14. If teh 17th term of an A.P exceeds its 10th term by 7, find teh common difference. A) -2. B) 0. C) -1. D) 1. Show Answer Correct Answer: D) 1. 15. Determine which of them are right triangles:(i) a= 6 cm, b = 8 cm, c = 10 cm(ii) a= 5 cm, b= 8 cm, = 11 cm A) (i). B) (ii). C) All the above. D) None of the above. Show Answer Correct Answer: A) (i). 16. The triangle whose lengths of sides are 3 cm, 4 cm, 5 cm is a ..... A) Obtuse-angled triangle. B) Acute-angled triangle. C) Right-angled triangle. D) None of these. Show Answer Correct Answer: C) Right-angled triangle. 17. The bottom of a 14-foot straight ladder is set into the ground 7 feet away from a wall. When the top of the ladder is leaned against the wall, its angle of elevation is 60. What is the distance above the ground it will reach? A) 4.0414 ft. B) 9.8994 ft. C) 7 ft. D) 12.1243 ft. Show Answer Correct Answer: D) 12.1243 ft. 18. An isosceles triangle has ..... A) No congruent sides. B) All congruent sides. C) Two congruent sides. D) None of the above. Show Answer Correct Answer: C) Two congruent sides. 19. Can the following 3 numbers be side measures of a triangle11, 12, 9 A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 20. How many acute angles must an acute triangle have? A) 1. B) 4. C) 3. D) 2. Show Answer Correct Answer: C) 3. 21. A triangle in which two sides are equal is called: A) Scalene triangle. B) Equilateral triangle. C) Isosceles triangle. D) None of the above. Show Answer Correct Answer: C) Isosceles triangle. 22. What does the term scalene mean? A) All sides equal. B) Two sides equal. C) 90 degree angle. D) All sides not equal. Show Answer Correct Answer: D) All sides not equal. 23. If two sides of a triangle are not equal, the triangle is called A) Scalene. B) Triangle. C) Right-angle triangle. D) Isosceles. Show Answer Correct Answer: A) Scalene. 24. If a car travels 240 km in 4 hours, what is its average speed? A) 60 km/h. B) 50 km/h. C) 80 km/h. D) 70 km/h. Show Answer Correct Answer: A) 60 km/h. 25. How many medians does a triangle have? A) 1. B) 3. C) 2. D) 4. Show Answer Correct Answer: B) 3. 26. Which of the following is not a rule of similarity of two triangles? A) S-A-S. B) A-A-A. C) R-H-S. D) S-S-S. Show Answer Correct Answer: C) R-H-S. 27. An obtuse triangle has at least one angle that is bigger than ..... degrees. A) 90. B) 45. C) 180. D) None of the above. Show Answer Correct Answer: A) 90. 28. A triangle in which any one of the three angles is exactly 90$^\circ$, is known as a right-angled triangle. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 29. The sum of length of any two sides of a triangle is A) Greater than the third side. B) Less than the third side. C) Equal to the third side. D) None of these. Show Answer Correct Answer: A) Greater than the third side. 30. Two plane figures are said to be congruent if they have: A) Same length and same breadth. B) Same length but different breadth. C) Same size and same shape. D) Different size but same shape. Show Answer Correct Answer: C) Same size and same shape. 31. If one angle is the average of the other two angles and the difference between the greatest and least angles is 60$^\circ$, then the formed triangle is A) An equilateral triangle. B) A right angled triangle. C) An isosceles triangle. D) A right angled isosceles triangle. Show Answer Correct Answer: B) A right angled triangle. 32. What does CPCTC stand for? A) Congruent parts of congruent triangles are congruent. B) Corresponding parts of congruent triangles are congruent. C) Corresponding parts of congruent triangles are Canadian. D) Corresponding parts of corresponding triangles are corresponding. Show Answer Correct Answer: B) Corresponding parts of congruent triangles are congruent. 33. What is the third angle of a triangle whose 1st angle is 79 and the 2nd angle is 43? A) 58. B) 101. C) 43. D) 72. Show Answer Correct Answer: A) 58. 34. A triangle with all angles less than 90$^\circ$ is: A) Obtuse. B) Right-angled. C) Acute. D) Scalene. Show Answer Correct Answer: C) Acute. 35. Among two congruent angles, one has a measure of 70$^\circ$. What will be the measure of the other angle? A) 140$^\circ$. B) 70$^\circ$. C) 35$^\circ$. D) 110$^\circ$. Show Answer Correct Answer: B) 70$^\circ$. 36. A baseball diamond is a square that is 90 feet on each side. If a player throws the ball from 2$^{nd}$ base to home, how far will the ball travel? A) 180 ft. B) 127.2792 ft. C) 8100 ft. D) 18.9736 ft. Show Answer Correct Answer: B) 127.2792 ft. 37. An obtuse triangle has ..... A) One angle greater than 90$^\circ$. B) A right (90$^\circ$) angle. C) All angles less than 90$^\circ$. D) All congruent angles. Show Answer Correct Answer: A) One angle greater than 90$^\circ$. 38. If a triangle has all angles less than 90$^\circ$ and two equal sides, what type of triangle is it? A) Obtuse Isosceles. B) Acute Scalene. C) Acute Isosceles. D) Obtuse Scalene. Show Answer Correct Answer: C) Acute Isosceles. 39. The ratio of the areas of two similar triangles is equal to A) Twice the ratio of their corresponding sides. B) Square root of the ratio of their corresponding sides. C) Square of the ratio of their corresponding sides. D) Cube of the ratio of their corresponding sides. Show Answer Correct Answer: C) Square of the ratio of their corresponding sides. 40. A tree 10 meters high casts a 17.3-meter shadow. What is the angle of depression of the sun? A) 35.3124 m. B) 59.9705 m. C) 30.0294 m. D) 54.6875 m. Show Answer Correct Answer: C) 30.0294 m. 41. The length of the diagonals of a rhombus are 30 cm and 40 cm. Find the side of the rhombus. A) 23 cm. B) 25 cm. C) 15 cm. D) 20 cm. Show Answer Correct Answer: B) 25 cm. 42. A plane is 30, 000 feet off the ground when it begins its approach to the runway. How far is the plane from the runway if the pilot lowers the nose at an angle of depression of 12 to meet the runway? A) 144, 292.0303 ft. B) 6, 376.6968 ft. C) 30, 670.2178 ft. D) 29, 344.4280 ft. Show Answer Correct Answer: A) 144, 292.0303 ft. 43. If a triangle has two equal sides, what type of triangle is it? A) Scalene. B) Right. C) Obtuse. D) Isosceles. Show Answer Correct Answer: D) Isosceles. 44. If a triangle has sides of lengths 5, 12, and 13, is it a right triangle? A) Yes. B) Not enough information. C) It depends on the angles. D) No. Show Answer Correct Answer: A) Yes. 45. For two triangles, if two angles and the included side of one triangle are equal to two angles and the included side of another triangle. Then the congruency rule is: A) SAS. B) AAS. C) ASA. D) SSS. Show Answer Correct Answer: C) ASA. 46. A line that divides an angle of a triangle into two equal parts is called: A) Median. B) Perpendicular. C) Angle bisector. D) Altitude. Show Answer Correct Answer: C) Angle bisector. 47. In Figure angle D= angle E and AD/DB =AE/EC, then Triangle BAC is A) Isosceles triangle. B) Scalene triangle. C) Equilateral triangle. D) Equilateral triangle. Show Answer Correct Answer: A) Isosceles triangle. 48. Perpendicular lines intersect at A) 90 degrees. B) 60 degrees. C) 120 degrees. D) 80 degrees. Show Answer Correct Answer: A) 90 degrees. 49. State if the three numbers can be the measures of the sides of a triangle:12, 8, 4 A) No. B) Yes. C) Not enough information. D) None of the above. Show Answer Correct Answer: A) No. 50. What triangle has one right angle and 2 acute angles? A) Acute triangle. B) Right triangle. C) Obtuse triangle. D) None of the above. Show Answer Correct Answer: B) Right triangle. 51. Which of the following is not a valid reason to prove congruent triangles? A) SAS. B) ASA. C) SSS. D) AAA. Show Answer Correct Answer: D) AAA. 52. If a line divides any two sides of a triangle in the same ratio then the line is ..... to the third side A) Parallel. B) Perpendicular. C) Co-incides. D) None of the above. Show Answer Correct Answer: A) Parallel. 53. What is the correct term if the triangle has one 90 degree angle? A) Scalene. B) Acute. C) Obtuse. D) Right. Show Answer Correct Answer: D) Right. 54. A triangle with no equal sides is called: A) Scalene. B) Equilateral. C) Isosceles. D) Obtuse. Show Answer Correct Answer: A) Scalene. 55. The difference between the lengths of any two sides is ..... than the length of the third side. A) Greater than. B) Less than. C) Altitude. D) None of the above. Show Answer Correct Answer: B) Less than. 56. True or False.A right triangle has 2 right angles. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 57. Congruent objects are ..... copies of one another. A) Opposite. B) Different. C) Exact. D) None of these. Show Answer Correct Answer: C) Exact. 58. A ladder 10 m long reaches a window 8 m above the ground. The distance of the foot of the ladder fromthe base of the wall is ..... m. A) 4 m. B) 8 m. C) 6 m. D) 2 m. Show Answer Correct Answer: C) 6 m. 59. If 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures ..... A) 60. B) 90. C) 80. D) 100. Show Answer Correct Answer: C) 80. 60. A triangle can have: A) Two obtuse angles. B) One obtuse angle. C) Three obtuse angles. D) Two right angles. Show Answer Correct Answer: B) One obtuse angle. Next →Related QuizzesMathematics QuizzesClass 10 QuizzesClass 10 Maths Chapter 6 Triangles Quiz 2Class 10 Maths Chapter 6 Triangles Quiz 3Class 10 Maths Chapter 6 Triangles Quiz 4Class 10 Maths Chapter 6 Triangles Quiz 5Class 10 Maths Chapter 6 Triangles Quiz 6 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books