Year 8
Revisiting area: Working out side lengths when given area
Year 8
Revisiting area: Working out side lengths when given area
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Lesson details
Key learning points
- In this lesson, we will be looking at working out side lengths of various quadrilaterals and triangles when only given the area and 1 other measure of a shape.
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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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5 Questions
Q1.
Which of the following is larger than the area of a circle with a radius of 3cm?
20
27
9
Q2.
Which of the following is larger than the area of a circle with a radius of 2cm?
10
11
12
Q3.
Which of the following is smaller than the area of a circle with a radius of 4cm?
53
60
70
Q4.
True or false: A circle with a radius of 1cm has a larger area than a rectangle with a base of 1cm and a height of 3cm.
False
Q5.
True or false: A circle with a radius of 2cm has a larger area than a rectangle with a base of 2cm and a height of 6cm.
False
5 Questions
Q1.
What is the height of a triangle with an area of 24 and a base of 8?
7
8
9
Q2.
What is the base of a parallelogram with an area of 24 and a height of 3?
6
7
9
Q3.
What is the height of a triangle with an area of 55 and a base of 11?
5
8
9
Q4.
This trapezium has an area of 25. Given that a=6 and b=4. Work out the height of the trapezium.
10
11
8
Q5.
This trapezium has an area of 30. Given that a=7 and h = 4. Work out the length of b.
10
11
5