Question

find the value of unknown angle in the following diagrams​

Answer 1

Answer:

140°

Step-by-step explanation:

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°

I hope my answer will be useful to you.

Answer 2

Answer:

70

Step-by-step

sum of total angle in triangle is = 180

40 + x + x = 180

40 + 2x     = 180

           2x  = 180 - 40

           2x  =  140

             x  =   140/2

             x  =   70