Question

Solve for I in the diagram below.
2x
(2 +10°

Answer 1

All 3 angles must add up to 90 degrees:

`x + 2x +(x+10) = 90 \\~\\4x = 80 \\~\\x = 20`

Answer 2

Explanation:

the sum of the angle is 90 degrees

x+2x+x+10=90

4x=90-10=80

4x=80

x=20