Question

find the value of x. x = ?° 45° 54°

Explanation:

Step1: Recall angle - sum property

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

Step2: Set up equation

Let the three angles of the triangle be 45°, 54°, and x. So, 45 + 54+x=180.

Step3: Simplify the left - hand side

45 + 54 = 99, so the equation becomes 99+x=180.

Step4: Solve for x

Subtract 99 from both sides: x=180 - 99.
x = 81

Answer:

81