/20 1234567891011121314151617181920 Triangles 1 / 20 1. The sum of the interior angles of a triangle is always A) 90 B) 120 C) 360 D) 180 2 / 20 2. If a triangle has sides 3 cm, 4 cm, and 5 cm, it is a A) Equilateral triangle B) Scalene triangle C) Isosceles triangle D) Right-angled triangle 3 / 20 3. The criteria for similarity of triangles are A) SAS similarity B) All of these C) AA similarity D) SAS similarity 4 / 20 4. If ΔABC ~ ΔPQR, then which of the following is true A) ∠C = ∠R B) All of these C) ∠B = ∠Q D) ∠A = ∠P 5 / 20 5. The side opposite to the right angle in a right-angled triangle is called A) None of these B) Base C) Height D) Hypotenuse 6 / 20 6. A triangle has how many sides A) 2 B) 3 C) 5 D) 4 7 / 20 7. If two triangles are similar, then their corresponding angles are A) Different B) Equal C) Proportional D) None of these 8 / 20 8. If two triangles have all three sides equal, then they are A) Neither congruent nor similar B) None of these C) Congruent D) Similar 9 / 20 9. If two sides of a triangle are 6 cm and 8 cm, and the hypotenuse is 10 cm, the triangle is A) Scalene B) Equilateral C) Isosceles D) Right-angled 10 / 20 10. The length of the diagonal of a square with side 5 cm is A) 5√2 cm B) None of these C) 10 cm D) 25 cm 11 / 20 11. If all three sides of a triangle are equal, it is called A) Equilateral B) Isosceles C) Scalene D) Right-angled 12 / 20 12. In a right-angled triangle, the longest side is called A) Base B) Hypotenuse C) Perpendicular D) Median 13 / 20 13. A line drawn parallel to one side of a triangle divides the other two sides in A) Equal ratio B) None of these C) Unequal ratio D) Any ratio 14 / 20 14. The Pythagoras theorem is applicable in A) Equilateral triangles B) Isosceles triangles C) Scalene triangles D) Right-angled triangles 15 / 20 15. If two triangles have equal corresponding angles, then they are A) None of these B) Both congruent and similar C) Similar D) Congruent 16 / 20 16. Two triangles are similar if their corresponding sides are A) None of these B) Different C) Equal D) Proportional 17 / 20 17. If two sides of a triangle are equal, the triangle is called A) Right-angled B) Equilateral C) Scalene D) Isosceles 18 / 20 18. The square of the hypotenuse is equal to the sum of the squares of the other two sides. This is known as A) Midpoint theorem B) None of these C) Pythagoras theorem D) Thales theorem 19 / 20 19. The ratio of the corresponding sides of two similar triangles is called A) Scale factor B) Angle bisector C) Perpendicular D) Median 20 / 20 20. The basic proportionality theorem is also known as A) Pythagoras theorem B) Midpoint theorem C) None of these D) Thales theorem
