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Pearson Geometry Common Core, 2011 View details

3. Bisectors in Triangles

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Exercise 40 Page 307

Use the Midpoint Formula.

(5,3.5)

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 A(6,8) and B(4,-1). Let's use these to find the coordinates of the midpoint.

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

SubstitutePoints

Substitute ( 6,8) & ( 4,-1)

(6+ 4/2,8+( -1)/2)

AddNeg

a+(- b)=a-b

(6+4/2, 8-1/2)

AddSubTerms

Add and subtract terms

(10/2,7/2)

CalcQuot

Calculate quotient