Online worksheet ยท 4 of 4
Radius and diameter are not interchangeable - Online practice 4
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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A circle has radius 4 cm. Use pi for the exact constant; do not replace it by a rounded decimal in these answers. Diameter = 2r, circumference = 2 x pi x r, area = pi x r^2. A semicircle's perimeter includes its straight diameter as well as the curved half-circumference.
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