Algebra with shapes
Now have a go yourself . . .
(1) The diagram shows a triangle inside a rectangle. All
How to . . .
measurements are given in centimetres.
ABCD is a square with a
side length of 4x.
M is the midpoint of DC.
N is the point on AD where
ND = x
BMN is a right-angled triangle.
Find
an
expression,
in
terms of x, for the area of triangle BMN. Give your expression in its simplest form.
Show that the total area, in cm2, of the shaded regions is
18x - 30
(2) The diagram shows a pentagon. All measurements are
given in centimetres.
(4)
Show that the area of this pentagon can be written as
5x2+x - 6
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ABCD is a rectangle.
X is the midpoint of AB.
Y is the midpoint of BC.
Z is the midpoint of CD.
What fraction of the total area of ABCD is shaded?
Show clearly how you got your answer.
Things to remember ...
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(4)
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