Question

A tortilla chip is shaped like an equilateral triangle.

If an exterior angle on this tortilla chip measures(2x-80), which equation can you solve to calculate the value of x?

HINT: The interior angles of an equilateral triangle all measure 60.

Answer 1

Explanation:

Two interior opposite angles of a triangle are equal to the exterior angel

`60 + 60 = 2x - 80 \\ 120 = 2x - 80 \\ 2x = 120 + 80 \\ 2x = 200 \\ x = (200)/(2) \\ x = 100`