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Question
primary 6 | Maths
| Measurement
2 Answers Below
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Date Posted: 3 years ago
Views: 478
(a) area
3 small circles
3×π×7²
= 3×(22/7)×7²
= 462cm² (Ans)
(b) perimeter
1 small + 1 big
2π×(7 + 14)
= 2 × (22/7) × (7+14)
= 132cm (Ans)
3 small circles
3×π×7²
= 3×(22/7)×7²
= 462cm² (Ans)
(b) perimeter
1 small + 1 big
2π×(7 + 14)
= 2 × (22/7) × (7+14)
= 132cm (Ans)
See 2 Answers
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Recognise what is the radius of the big circle and the small circle. Then work out the area of each circle onwards, then do the necessary subtraction.
Date Posted:
3 years ago
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Notice that the entire diameter of the small circle touches the centre of the big circle, this means that the radius of the big circle = diameter of small circle
Date Posted:
3 years ago
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