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Question
primary 6 | Maths
| Geometry
2 Answers Below
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Pls help. Tks
You can cut away a quarter circle from the shaded ¾ circle, and fit it into the unshaded part.
Then now you have a semicircle and triangle.
Triangle's base is just 2 times the radius of the circle.
Base = 2 x 21cm = 42cm
Total shaded area
= triangle area + semicircle area
= ½ x 42cm x 21cm + ½ x 21cm x 21cm 22/7
= 441cm² + 693cm²
= 1134cm²
With this method, we don't actually have to find the two small shaded areas separately
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