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Question
primary 6 | Maths
| Percentage
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How to do this question? Please help, thanks.
Date Posted: 4 years ago
Views: 277
Circumference of circle
formula = 2πr or πd
Since radius is given, use the first formula
As we have a semicircle here, the curved length is ½ of a full circle's circumference
= πr
22/7 x 14cm = 44cm
Now add the diameter (the straight length)
Diameter is twice of radius
So 14cm x 2 = 28cm
Total = 28cm + 44cm = 72cm
formula = 2πr or πd
Since radius is given, use the first formula
As we have a semicircle here, the curved length is ½ of a full circle's circumference
= πr
22/7 x 14cm = 44cm
Now add the diameter (the straight length)
Diameter is twice of radius
So 14cm x 2 = 28cm
Total = 28cm + 44cm = 72cm
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