Question

38.The complementary angle for 72°is______

A)108°
B)18°
C)28°
D)118°​

Answer 1

Answer:

• The complementary angle for 72° is B) 18° .

Step-by-step explanation:

We know that:

• Complementary angle = 90° - x

Where,

• x is the measure of given angle.

Finding the complementary angel for 72°:

Complementary angle = 90° - 72°

Complementary angle = 18°

Hence,

• The complementary angle for 72° is 18°.

What is complementary angle?

↠ Angles are said to be complementary angle if the sum of two angles are 90°.

E.g. Angles 20° and 70° are complementary to each other.

Answer 2

Given :-

An angle = 72°

To Find :-

The complementary angle

Solution :-

We know that,

In complementary angle

∠A + ∠B = 90

72 + ∠B = 90

∠B = 90 - 72

∠B = 18°

Know More :-

In complementary angle

• ∠A + ∠B = 90°

In supplementary angle

• ∠A + ∠B = 180°