Question

Points D, B, and E are collinear. Find the value of a so that points A, B, and C

are collinear.

Answer 1

Answer: x = 14

Explanation:

For points A, B, and C to be collinear, angle ABD and EBC must be vertical angles. Vertical angles are congruent so we will set them equal to each other and solve for x.

Given:

126 = 9x

Divide both sides of the equation by 9:

14 = x

Reflexive property:

x = 14