Pythagorean theorem

(Problems:51-55)
Application word problems:

1, state -coundown-72-2007(4)

An 8.5-meter ladder is leaning against a vertical wall.  How many meters is its base from the wall if the ladder reaches 7.5 meters up to the wall?

2, school-coundown-35-2007

A right isosceles triangle has a hypotenuse with measure 18 centers.  What is the length, in centimeters, of one leg of the triangle?  Express your answer is simplest radical form.

3, AMC-2007-14

The base of isosceles triangle ABC is 24 and its area is 60.  What is the length of one of the congruent sides?(A)        5        (B)  8     (C) 13     (D)    14     (E)    18

4,In trapezoid ABCD, the side AB and CD are equal.  The height is 3.  What is the perimeter of ABCD? 


More study :
Pythagorean theorem1 
Pythagorean theorem2

Worksheet
Pythagorean theorem-mathaid