Question

Find the third angle of a right angle triangle whose one angle is of 40°?​

Answer 1

Step-by-step explanation:

In this question we have given,

The triangle is right angle, which means one angle of the triangle is 90°.

We have also given one more angle of the triangle i.e., 40°.

Let, consider the 3rd angel be = x

Angel sum property of a triangle is =180°

=> 90° + 40° + x = 180°

=> 130° + x = 180°

=> x = 180° - 130°

=> x = 50°

Therefore, the third angle of a right angle triangle is 50°.

According to given question,

The size of the other 2 angle is = 90° + 50°

=> 140°

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Answer 2

Step-by-step explanation:

IN TRIANGLE ABC,

ANGLE A = 40°

ANGLE B = 90°

AS WE KNOW, SUM OF ALL ANGLES OF A TRIANGLE IS 180°

SO,

A + B + C = 180°

130° + C = 180°

C = 180° - 30°

C = 50° .