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Glencoe Math: Course 2, Volume 2

GM

Glencoe Math: Course 2, Volume 2 View details

1. Solve One-Step Addition and Subtraction Equations

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Exercise 11 Page 442

Use the fact that the sum of angle measures in a quadrilateral is 360.

Equation: x+115+65+115=360
Missing Measure: 65^(∘)

Practice makes perfect

We want to write and solve an equation to find the missing measure x in the given quadrilateral.

To do this, we can use the fact that the sum of the measures of the angles of a quadrilateral is 360^(∘). Let's use this fact to write an equation by adding the given measures and setting the sum equal to 360. x+ 115+ 65+ 115=360 Now, let's solve the equation for x.

x+115+65+115=360

Add terms

x+295=360

LHS-295=RHS-295

x+295-295=360-295

Subtract terms

x=65

The missing measure is 65^(∘).

Subchapter links

Guided Practice p.440

Independent Practice p.441-442

H.O.T. Problems p.442

Standardized Test Practice p.442-444

Extra Practice p.443

Common Core Review p.444