Pre-Algebra Demystified

PRACTICE

1. Find the length of the hypotenuse of a right triangle whose sides are 24
   inches and 18 inches.


2. Find the length of a side of a right triangle whose hypotenuse is 17
   yards and whose other side is 15 yards.


3. Find the distance that you would walk up a staircase if it is 21 feet
   high and has a base of 28 feet.


4. Find the perimeter of a flower garden if its shape is a right triangle
   with a hypotenuse of 10 feet and a side of 8 feet.


5. Find the hypotenuse of a sail whose shape is a right triangle with a
   base of 15 feet and whose height is 36 feet.

ANSWERS

1.

ffiffiffiffiffiffiffiffi

900

p

¼30 inches

2.

ffiffiffiffiffi

64

p

¼8 yards

3.

ffiffiffiffiffiffiffiffiffiffi

1225

p

¼35 feet

4. 24 feet


5. 
   

ffiffiffiffiffiffiffiffiffiffi

1521

p

¼39 feet

Quiz

1. Find the perimeter of a rectangle whose length is 18 feet and whose
   width is 7 feet.
   (a) 11 ft
   (b) 25 ft
   (c) 50 ft
   (d) 126 ft


2. Find the circumference of a circle whose diameter is 24 inches. Use
   p¼3.14.
   (a) 37.68 in.
   (b) 75.36 in.
   (c) 452.16 in.
   (d) 1808.64 in.


3. Find the perimeter of a square whose side is 19 inches.
   (a) 361 in.
   (b) 57 in.

CHAPTER 9 Informal Geometry 185