Topic/Skill Definition/Tips
Topic: Perimeter and Area Example
1. Perimeter The total distance around the outside of a
shape.
Units include: mm , cm , metc.
P=8+5+8+5=26 cm
2. Area The amount of space inside a shape.
Units include: m m2 , c m2 , m2
3. Area of a Length x Width
Rectangle 2
A=36 c m
4. Area of a Base x Perpendicular Height
Parallelogram Not the slant height.
A=21 c m2
5. Area of a Base x Height ÷ 2
Triangle
2
A=24 c m
6. Area of a Split in to two triangles and use the
Kite method above.
2
A=8.8 m
7. Area of a (a+ b)
×h
Trapezium 2
2
A=55 c m
“Half the sum of the parallel side, times the
height between them. That is how you
calculate the area of a trapezium”
8. Compound A shape made up of a combination of
Shape other known shapes put together.
Mr A. Coleman Glyn School
Topic: Perimeter and Area Example
1. Perimeter The total distance around the outside of a
shape.
Units include: mm , cm , metc.
P=8+5+8+5=26 cm
2. Area The amount of space inside a shape.
Units include: m m2 , c m2 , m2
3. Area of a Length x Width
Rectangle 2
A=36 c m
4. Area of a Base x Perpendicular Height
Parallelogram Not the slant height.
A=21 c m2
5. Area of a Base x Height ÷ 2
Triangle
2
A=24 c m
6. Area of a Split in to two triangles and use the
Kite method above.
2
A=8.8 m
7. Area of a (a+ b)
×h
Trapezium 2
2
A=55 c m
“Half the sum of the parallel side, times the
height between them. That is how you
calculate the area of a trapezium”
8. Compound A shape made up of a combination of
Shape other known shapes put together.
Mr A. Coleman Glyn School
