Calculate the area of non-rectilinear shapes

Calculate the area of non-rectilinear shapes

Lesson details

Key learning points

  1. 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

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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
Correct answer: a x b
a² + b²
Q2.
Choose a formula that could be used to calculate the area of a square.
a x 4
Correct answer:
a² x b²
Q3.
Choose a formula that could be used to calculate the perimeter of a rectangle.
Correct answer: 2 (a + b)
a + b
a x 4
Q4.
Choose a formula to calculate the perimeter of a regular hexagon.
5a
Correct answer: 6a
7a

6 Questions

Q1.
What is the area of the shape below?
An image in a quiz
Correct answer: 12 cm²
16 cm²
8 cm²
Q2.
What is the perimeter of the shape below?
An image in a quiz
Correct answer: 16 cm
16 cm²
8 cm
Q3.
What is the perimeter of the shape below?
An image in a quiz
Correct answer: 28 cm
28 cm²
49 cm
Q4.
What is the area of the shape below?
An image in a quiz
28 cm
49 cm
Correct answer: 49 cm²
Q5.
What is the area of the shape below?
An image in a quiz
21 cm²
24 cm²
27 cm²
Correct answer: 36 cm²
45 cm²
Q6.
What is the perimeter of the shape below?
An image in a quiz
22 cm
28 cm
Correct answer: 30 cm

Lesson appears in

UnitMaths / 2-D shape, perimeter and area