Question

21. Find the value of the unknown x in the above right sided figure.​

Answer 1

Step-by-step explanation:

sum of angles of triangle is 180°

therefore,

x +2x+ 90°=180°

3x= 90°

x= 30°

Answer 2

Sum of all angles of a triangle = 180°

=》x + 2x + 90 = 180°

=》 3x = 180 - 90

=》 x = 90/3

=》 x = 30

2x = 2×30 = 60