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McGraw Hill Glencoe Geometry, 2012

MH

McGraw Hill Glencoe Geometry, 2012 View details

5. Parts of Similar Triangles

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Exercise 49 Page 508

Use the Distance Formula.

sqrt(137) ≈ 11.7

Practice makes perfect

To determine the distance between two points, we use the Distance Formula. The coordinates of the given points are W(7,3) and Z(- 4,- 1).

WZ = sqrt((x_2-x_1)^2 + (y_2-y_1)^2)

SubstitutePoints

Substitute ( 7,3) & ( - 4,- 1)

WZ=sqrt(( - 4- 7)^2+( - 1- 3)^2)

Subtract terms

WZ=sqrt((- 11)^2+(- 4)^2)

Calculate power

WZ=sqrt(121+16)

Add terms

WZ=sqrt(137)

Calculate root

WZ ≈ 11.7

The distance between W and Z is approximately 11.7.

Subchapter links

Check Your Understanding p.504-505

Practice and Problem Solving p.505-507

H.O.T. Problems p.507

Standardized Test Practice p.508

Spiral Review p.508

Skills Review p.508