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Pearson Geometry Common Core, 2011 View details

7. Midpoint and Distance in the Coordinate Plane

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Exercise 14 Page 54

Use the Midpoint Formula.

(-2.25, 2.1)

Practice makes perfect

To find the midpoint, we can use the Midpoint Formula. M(x_1+x_2/2,y_1+y_2/2)The coordinates of the given endpoints are (-6.3,5.2) and (1.8,-1). Let's use these to find the coordinates of the midpoint.

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

SubstitutePoints

Substitute ( -6.3,5.2) & ( 1.8,-1)

M(-6.3+ 1.8/2,5.2+( -1)/2)

AddNeg

a+(- b)=a-b

M(-6.3+1.8/2,5.2-1/2)

AddSubTerms

Add and subtract terms

M(-4.5/2,4.2/2)

CalcQuot

Calculate quotient