Posted by **carol** on Sunday, February 24, 2008 at 10:44pm.

crystal wants to build a ramp that will rise 4ft over a horizontal distance of 20ft. how long will the ramp be? round to the nearest tenth.

- math -
**Emily**, Sunday, February 24, 2008 at 11:11pm
Use the Pythagorean Theorem.

a^2 + b^2 = c^2

4^2 + 20^2 = c^2

16 + 400 = c^2

416 = c^2

c = sqrt 416

c = 20.4

If you draw a picture, you'll end up with a right triangle, and the two shorter sides are a and b, and the hypotenuse (long side) is c.

Do you get it?

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