Question

find the value of x.

Explanation:

Step1: Recall angle - sum property

The sum of interior angles of a triangle is 180°. So, 81°+66°+x° = 180°.

Step2: Simplify the left - hand side

81 + 66+x=180, which gives 147 + x=180.

Step3: Solve for x

Subtract 147 from both sides: x=180 - 147.
x = 33

Answer:

33