Question

In a right triangle ABC, one of the angles is 40, find third angle *​

Answer 1

Answer:

50°

Step-by-step explanation:

In a right angled triangle, one angle is 90°.

Given, second angle = 40°

According to the angle sum property of triangle, the sum of all three angles of a triangle is 180°.

Third angle = 180° - (90+40)° = 180° - 130° = 50°

Answer 2

Answer:

50°

Step-by-step explanation:

<A = 90° [Since ∆ is a right-angled ∆]

<B = 40° [Given]

Let <C = x

In a ∆,

<A + <B + <C = 180° [Angle sum property of a ∆]

90° + 40° + x = 180°

130° + x = 180°

x = 180° - 130°

x = 50°

Hence, the required third angle = 50°