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Pearson Geometry Common Core, 2011 View details

Cumulative Standards Review

Exercise 5 Page 485

Use the Midpoint Formula.

Practice makes perfect

To find the midpoint, we can use the Midpoint Formula. (x_1+x_2/2,y_1+y_2/2)The coordinates of the given endpoints are (6,- 11) and (- 18,7). Let's use these to find the coordinates of the midpoint.

P(x_1+x_2/2,y_1+y_2/2)

SubstitutePoints

Substitute ( 6,- 11) & ( - 18,7)

P(6+( - 18)/2,- 11+ 7/2)

AddNeg

a+(- b)=a-b

P(- 12/2,- 11+7/2)

AddTerms

Add terms

P(- 12/2,- 4/2)

CalcQuot

Calculate quotient