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McGraw Hill Integrated II, 2012

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McGraw Hill Integrated II, 2012 View details

5. Parts of Similar Triangles

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Exercise 47 Page 590

Use the Distance Formula.

5

Practice makes perfect

To determine the distance between two points, we use the Distance Formula. The coordinates of the given points are A(2,3) and B(5,7).

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

SubstitutePoints

Substitute ( 2,3) & ( 5,7)

AB=sqrt(( 5- 2)^2+( 7- 3)^2)

Subtract terms

AB=sqrt(3^2+4^2)

Calculate power

AB=sqrt(9+16)

Add terms

AB=sqrt(25)

Calculate root

AB=5

The distance between A and B is 5.

Subchapter links

Exercises p.586-590