Maths Quiz - Perimeter and Area 2 (Easy) (Answers)
This is the second of our easy Eleven Plus maths quizzes on perimeter and area. If you have played the first then you will know that the perimeter is the lengths of the sides of a 2D shape added together. The perimeter of a circle is called the circumference. The area of a 2D shape is the ‘space’ enclosed by the shapes perimeter.
To calculate perimeter, circumference and area, you may find these formulae helpful:
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Halve the area of the given square: two right angled triangles form a square or a rectangle
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You will find ? very useful in maths, so try to remember its value if you can
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Area of a triangle = 1?2 × base × height
1?2 x 4.8 x 6.4 = 15.36 |
The area of a rectangle = length × width:
72 cm2 = length x 8: 72 ÷ 8 = 9 |
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There are 100 mm2 in one 1 cm2 so, to convert cm2 to mm2, just multiply by 100
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The formula for finding the area of a circle is: Area = ? × r2
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Perimeter of a rectangle = 2 × length + 2 × width:
(2 × 6) + (2 × 12) = 12 + 24 = 36 cm. Do not confuse perimeter and area! |
The area of a square = length x length:
18 x 18 = 324. There are two squares so, 324 x 2 = 648. There are 100 mm2 in one cm2 so 648 x 100 = 64,800 |
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The area of a rectangle = length x width:
1.2 x 1.5 = 1.8. There are 10,000 cm2 in one m2 so 1.8 x 10,000 = 18,000 |
The area of a square = length × length:
121 = length × length. If you know your times tables you will know that 11 x 11 = 121 |