Page 269 - MATHEMATICS COURSE FOR SECONDARY SCHOOLS BOOK 2
P. 269
Consider the right-angled triangle ABC.
Using Pythagoras’ theorem:
AB2 = AC2 + BC2
So AB2 = x2 + y2
=√ x2+y2 EXAMPLE 3
(a)
A
Calculate the length of vector AB.
(b)
Calculate the magnitude of vector PQ. (c)
The length of AB
Q
K
Calculate the size of vector KL.
L
B
P
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