Maths Quiz : Triangles


1.If two angles are complementary to each other, then each angle will be-
A. acute angle
B. obtuse angle
C. right angle
D. reflex angle

2.What is the complementary angle of 72°40’?
A. 108°40’
B. 27°15’
C. 17°20’
D. 13°50’

3.The measure of an angle is 5 times to its complementary angle. Then the measure of an angle is-
A. 24 degree
B. 40 degree
C. 82 degree
D. 75 degree
4.If 3∠A=4∠B=∠C, then A:B:C= ?
A. 3:5:6
B. 4:3:12
C. 3:5:7
D. 4:5:7
5.In a triangle ABC, if ∠A+∠B=125 and ∠A+∠C=113, Find ∠A –
A. 52
B. 63
C. 58
D. 72

6.The exterior angle of a triangle is 110° and one of its interior angle is 45°. Then its another interior angle is-
A. 65
B. 25
C. 45
D. 105
7.The angles of a triangle are in the ratio of 3:5:7. Then the triangle is-
A. right triangle
B. obtuse triangle
C. acute triangle
D. scalene triangle
8.AOB is a straight line. If ∠AOC=40 ,∠COD=4x and ∠BOD=3x,Then find ∠COD ?
A. 100
B. 80
C. 120
D. 75
9.AOB is a straight line. If x:y:z = 4:5:6, then y= ?
A. 90
B. 54
C. 66
D. 60
10.An angle whose measure is more than 180 and less than 360, is known as-
A. acute angle
B. reflex angle
C. right angle
D. obtuse angle

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