Question

HELP ME PLEASEE ASAP!!!! PLEASEE

Answer 1

25

Explanation:

So there is this property,

Sum of two angle of triangle = exterior angle

So based on this we can form an algebraic equation (NOTE: this is an equilateral triangle so all the sides are 60°)

`4x + 20 = 60 + 60 \\ 4x = 120 - 20 \\ 4x = 100 \\ x = (100)/(4) \\ x = 25`

So it's option B.