A = 78.54 cm2
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Area of circle: pi*5^2 = 78.5 square cm rounded to 1 decimal place
the square root of 7
Area of circle = 78.54 sq cm => Radius of circle = 5 cm => Diameter of circle = 10 cm => Side of square = 10cm => Area of square = 100cm2
Area of circle: pi*5^2 = 78.53981634 square cm Area of circle: pi*5.1^2 = 81.71282492 square cm
it is half the diameter e.g 10cm diameter = 5 cm radius