Area - Polygons - SACHS
Area of Square / Rectangle
Example:
8 cm
A = lb
= 8 x 4
= 32 cm2
4 cm
Your turn:
9 cm
A = lb
= 9 x
=
6 cm
cm2
Example:
12 cm
A = ½ bh
= ½ x 12 x 4
= 24 cm2
Area of triangle
4 cm
Your turn:
A = ½ bh
= ½ x
=
6 cm
16 cm
cm2
x
Example:
10 m
Area of Parallelogram
A = bh
= 10 x 7
= 70 m2
7 m
Your turn:
A = bh
=
=
11 cm
x
5 cm
cm2
Example:
Area of Kite / Rhombus
A = ½ xy
14 cm
= ½ x 14 x 8
= 56 cm2
8 cm
Your turn:
A = ½ xy
=
= ½ x 11 x
11 m
m2
6 m
Example:
A = ½ h (a + b)
= 50 cm2
= ½ x 5 x (8 + 12)
12 cm
8 cm
5 cm
Area of Trapezium
Your turn:
A = ½ h (a + b)
= ½ x
=
cm2
6 cm
9 cm
x (
4 cm
+ 6)
A = bh
12 m
Select the correct option:
A = ½ bh
5 m
A = lb
A = ½ x 12 x 5
12 m
Select the correct option for the next line:
5 m
A = 12 x 5
A = ½ bh
A = ½ xy
5 m
Select the correct option:
22 m
A = ½ bh
A = lb
A = ½ x 22 x 5
5 m
Select the correct option for the next line:
22 m
A = lb
A = 22 x 5
A = ½ xy
12 m
20 m
6 m
Select the correct option:
A = ½ bh
A = ½ h (a + b)
A = ½ x 6 x (12 + 20)
12 m
20 m
6 m
Select the correct option for the next line:
A = ½ x 20 x (6 + 12)
A = ½ h (a + b)
A = ½ xy
14 m
Select the correct option:
8 m
A = bh
A = ½ h (a + b)
A = 14 x 8
14 m
Select the correct option for the next line:
8 m
A = ½ x 14 x 8
A = bh
A = ½ xy
22 m
Select the correct option:
A = bh
10 m
A = ½ h (a + b)
A = ½ x 22 x 10
22 m
Select the correct option for the next line:
10 m
A = ½ x 22 x (10 + 10)
A = ½ xy
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