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Pearson Geometry Common Core, 2011

PG

Pearson Geometry Common Core, 2011 View details

Chapter Review

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Exercise 14 Page 72

Line AB and BC are congruent.

m = 15

Practice makes perfect

We know that AB is congruent to BC because they have matching tick–marks.

This means that the expressions for their lengths must be equal. We can set the two expressions equal to one another and solve for m.

3m+5=4m-10

LHS+10=RHS+10

3m+15=4m

LHS-3m=RHS-3m

15=m

Rearrange equation

m=15

Subchapter links

Exercises p.70-74