Question

O A. 12x + 20 = 180
O B. 12x = 180
O C. 12x - 20 = 180
D. 8x - 10 = 4x + 10

Answer 1

It’s B the answer is B

Answer 2

Answer B. 12x = 180

Explanation:

Angles in a Triangle

The sum of the interior angles in a triangle is 180°.

We are given all the angles of the triangle shown in the figure, all of them as a function of x.

Since the sum is 180°:

2x + 4x + 10 + 6x - 10 = 180

Collecting like terms:

12x = 180

This is the equation to find the value of x.

Answer B. 12x = 180