Pythagorean Blog PostBy:Trina

PracticeQuestion 4

Find the height of the pole where the guy wire is attached, to the nearest tenth of a metre. Pole

Guy Wire

2m

10m

?

a + b = c2 2 2

a + 2 = 102 2 2

A + 4 = 100

100 - 4 = 96

96 = 9.8

This height of the of the pole is 9.8m.

ApplyQuestion 7

What is the height of the wheelchair ramp? Give our answer to the nearest tenth of a centimeter.

80 cm

79 cm

a + b = c2 2 2

a + 79 = 802 2 2

A + 6241 = 6400

6400 – 6241 = 159159 = 12.6

The height of the ramp is 12.6 cm.

ExtendQuestion 12

Sarah has a vegetable garden in the shape of a right triangle. She wants to put fencing all around it to keep the rabbits away.

a. What total length of fencing does she need? Give your answer to the nearest hundredth of a metre.

b. If fencing cost $2/m, what will be the total cost of the fencing?

4m

a + b =c 2 2 2

a + 3 = 42 2 2

A + 9 = 16

16 – 9 = 7

7 = 2.64m + 3m +2.6m = 9.6m

The total length of fencing she needs is 9.6 metres.

9.6 X $2 = $19.20

The total cost of fencing is $19.20.