Targeting Grade C

1
GCSE Mathematics
Targeting Grade C
SSM 3
2
Practice 1 Remember the formula L x
W Practice 2 Remember the formula ½ x b x
h TAIL 1 Practice 3 Remember the formula ½ x (a
b) x h Practice 4 To calculate the area of a
composite shape, divide the shapes into
rectangles and/or triangles, find the area of
each shape separately and add together Practice
5 Remember the cross-section is the face which
stays the same wherever you cut the prism TAIL 2

• Can you
• Calculate the area of a rectangle
• Calculate the area of a triangle
• Calculate the area of a composite
• shape
• Calculate the area of a trapezium
• Calculate the area of a cross-section of a prism
• Calculate surface area of a prism
• Try a test

If not you need
3
Remember the formula for area of a rectangle is
length x width
Practice 1 Find the area of the following
rectangles 1. 2. A field is in the
shape of a rectangle. It measures 94 metres by
221 metres. What is its area in square
metres? 3. The driveway to a house has to be
re-surfaced. The cost is ?56 per square
metre. What is the cost for a drive measuring 16
metres by 5 metres?
4
Practice 2 Find the area of the following
triangles
Remember the formula for finding the area of a
triangle is ½ x base x height
5
Practice 3 Find the area of the following
trapezium
Remember the formula for finding the area of a
trapezium is ½ x (a b) x h
6
Practice 4 Find the area of the following
composite shapes
Divide the shapes into rectangles and/or
triangles and find the areas of each shape
separately then add the areas together
7
TAIL 1
Are you ready for the answers?

• 7.1 x 3.6 25.56
• To 1 decimal place 25.6

Area of rectangle is length x width Area 2x x
2x² 2x² 50 x² 25 X 5 Length is 2x so
length 2 5 10
8
Practice 5 Find the area of the cross-section of
the following shapes
Remember a cross-section of a prism is the shape
which stays the same if the shape is sliced
through
9
Are you ready for the answers?
TAIL 2
17 x 8 13 x 10 17 x 8 136 130 136 402cm²
3 x 9 3 x 4 27 12 39cm²
10 x 5 (0.5 x (10 5) x 4) 50 30 20cm²
5.6 x 2.5 14 7.2 2.5 4.7 4.7 x 1.8 8.46 14
8.46 22.46cm²