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Pearson Geometry Common Core, 2011

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Pearson Geometry Common Core, 2011 View details

5. Reasoning in Algebra and Geometry

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Exercise 38 Page 119

The sum of angles ∠ BOC, ∠ COD and ∠ DOE is equal to angle ∠ BOE.

m∠ BOE=90

Practice makes perfect

We have been asked to find m∠ BOE. The expression m∠ BOE is the angle measure between the rays OB and OE.

The sum of m∠ BOC, m∠ COD and m∠ DOE is equal to m∠ BOE. m∠ BOC+ m∠ COD + m∠ DOE= m∠ BOE

m∠ BOC+m∠ COD + m∠ DOE=m∠ BOE

SubstituteValues

Substitute values

20+ 45+25=m∠ BOE

Add terms

90=m∠ BOE

Rearrange equation

m∠ BOE= 90

Subchapter links

Lesson Check p.116

Practice and Problem-Solving Exercises p.117-119

Standardized Test Prep p.119

Mixed Review p.119