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What is the area of a circle if the raduis is7.3?
I assume you have access to a calculator, so 7.3 x 7.3 x 3.1415
What is the raduis of a circle that is inside a square with an area of 400 cm?
Assuming the circle is tangent to the sides of the square, then the edges of the circle meet the square at the midpoint on each of the four sides. So the diameter of the circle is the same as the length of a side of the square. So all you need to do is find the length from the total area by taking the square root of the area (since A = s2), which gives you the diameter, then halve it to get the radius.
What is the surface area of a cylinder if the raduis is 7 and the length is 25?
1407.43 units2
How did the Romans work out the area of a circle?
The area of a circle is the number of square units inside that circle, if each square in the circle to the left has an area of 1cm2, you could count the total number of squares to get the area of this circle. However, it is easier to use one the following formulas; A=.r²or A=pi times r times r, where A is the area and r is the radius.
Do you use square centimetres when measuring a circular shape?
Answer: no, u measure the raduis Answer: The area of any figure will be expressed in square centimeters, or some other square units. The actual measurements, in a circle, are of course done in linear units (e.g., centimeters) - the area will then be calculated.
