Pythagoras Theorem - thomas whitham maths site [licensed

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Pythagoras Theorem
Example
For each of the following right angled triangles find the length of the
lettered side, giving your answers to 2 decimal places.
(i)
x
9 cm
5 cm
(ii)
y
14 cm
15 cm
(iii)
c
23 cm
8 cm
(iv)
29 cm
17 cm
m
(v)
14 cm
y
10 cm
(v)
36 cm
b
12 cm
(vi)
4.8 m
5.9 m
e
Example
In triangle ABC, angle B = 90⁰ AB = 7cm and AC = 11cm.
Work out the length of BC, giving your answer correct to 1 decimal place.
Example
Work out the length of NM in the triangle drawn below.
M
48 mm
N
22 mm
L
AQA June 2003 GCSE Paper
A support for a flagpole is attached at a height of 3m and is fixed to the ground at a
distance of 1.2m from the base.
x
3m
1.2m
Calculate the length of the support (marked x on the diagram).

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