Question

The angle measures of triangle ABC are given
• The measure of angle A is (2x – 10)
• The measure of angle B is 70°
• The measure of angle Cis (4x)
What is the value of x?

Answer 1

x is equal to 20.

The angles of one triangle always add up to 180°, so we can add the measures of each angle together and make an equation.

equation —> 2x - 10 + 70 + 4x = 180

After combining like terms, we get 6x + 60 = 180.

Then we can subtract 60 from both sides to isolate the variable, and the equation becomes 6x = 120. Then we can divide both sides by 6 to get the value of x. The equation becomes x = 20.