MathserciseC

1
Mathsercise-C
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• Pythagoras

Here we go!
2
Use Pythagoras to work out the length of AC
9m
Question 2
B
A
5m
Label the sides a, b,and c
Answer
a
c
C
b
c must be the long side (hypotenuse), a and b do
not matter
1
Pythagoras
3
Use Pythagoras to work out the length of AC
a
9m
Question 2
9
B
A
b
Now substitute in the values that you know!
5
5m
c
Answer
C
a2 b2 c2
c2

2
2
81 25 c2
106 c2
1
Pythagoras
c v106
c 10.3 cm
4
Work out the length of BC
This time you have to subtract!
A
Question 3
8.3
8.3m
2.5m
2.5
c
a
Answer
C
b
B
a2 b2 c2
2
2 b2
6.25 b2 68.89
2
Pythagoras
b v62.64
b 7.9m
5
Find the length of AC in this right angled
triangle
5cm
B
A
Question 4
12cm
C
52 122 c2
Answer
25 144 c2
169 c2
C
c v169
c 13cm
3
Pythagoras
6
Find the length of AC in this right angled
triangle
10.5cm
A
B
Start
b
17.5cm
Answer
17.52 10.52 b2
306.25 110.25 b2
C
196 b2
b v196
4
Pythagoras
b 14cm