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Glencoe Math: Course 2, Volume 2

GM

Glencoe Math: Course 2, Volume 2 View details

1. Classify Angles

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Exercise 11 Page 539

The sum of the angles is equal to 180.

11

Practice makes perfect

We want to find the value of x. Let's take a look at the angles.

The labeled angles are adjacent angles and together they form a straight angle. This means that the sum of the angles measures 180^(∘). 15+ 15x=180 Let's solve the equation for x.

15 + 15x = 180

LHS-15=RHS-15

15x = 165

.LHS /15.=.RHS /15.

15x/15 = 165/15

Calculate quotient

x = 11

Subchapter links

Guided Practice p.538

Independent Practice p.539-540

H.O.T. Problems p.540

Standardized Test Practice p.540-542

Extra Practice p.541

Common Core Review p.542