Finding the value of x using complementary angles - Online Tutor

The video tutorial explains how to find the measures of two complementary angles given their expressions in terms of X. It begins with a review of complementary and supplementary angles, then sets up an equation based on the given expressions. The tutorial proceeds to solve the equation to find the value of X and uses this value to calculate the actual measures of the angles. The process involves combining like terms, solving for X, and substituting back to find the angle measures.

What is the sum of two complementary angles?

• 180 degrees

• 90 degrees

• 360 degrees

• 45 degrees

If two angles are complementary and one is 30 degrees, what is the measure of the other angle?

• 60 degrees

• 70 degrees

• 50 degrees

• 80 degrees

In the equation 7X + 17 + 3X - 20 = 90, what is the value of X?

• 8.5

• 10

• 7.2

• 9.3

After solving for X, what is the measure of the angle represented by 7X + 17?

• 82.1 degrees

• 75 degrees

• 90 degrees

• 70 degrees

What is the measure of the angle represented by 3X - 20 after substituting the value of X?

• 10 degrees

• 7.9 degrees

• 15 degrees

• 5 degrees