Year 5
Year 5
Calculate the area of non-rectilinear shapes
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Lesson details
Key learning points
- In this lesson, we will estimate the area of shapes that are not rectangles and are presented on a grid. Then we will use a mixture of calculating the area of rectangles and counting the additional parts to estimate the total area.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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4 Questions
Q1.
Choose a formula that could be used to calculate the area of a rectangle.
2 (a + b)
a + a + b + b
a² + b²
Q2.
Choose a formula that could be used to calculate the area of a square.
a x 4
a² x b²
Q3.
Choose a formula that could be used to calculate the perimeter of a rectangle.
a + b
a x 4
Q4.
Choose a formula to calculate the perimeter of a regular hexagon.
5a
7a
6 Questions
Q1.
What is the area of the shape below?
16 cm²
8 cm²
Q2.
What is the perimeter of the shape below?
16 cm²
8 cm
Q3.
What is the perimeter of the shape below?
28 cm²
49 cm
Q4.
What is the area of the shape below?
28 cm
49 cm
Q5.
What is the area of the shape below?
21 cm²
24 cm²
27 cm²
45 cm²
Q6.
What is the perimeter of the shape below?
22 cm
28 cm