25
six9
It is: pi*4^2 divided by 2 = 8/pi which is about 25 square cm
Diameter: 2*4 = 8 cm
8.0
trapezoid = 1/2 sum of bases x height = 104 semicircle = 1/2 pi x diameter squared/4 = 100.48 total = 204.48 sq ft
Its circumference is: 8*pi cm
It is: pi*4^2 divided by 2 = 8/pi which is about 25 square cm
Twice as big.
8*pi + 16 = 41.13 cm (approx)It depends on whether 8 cm is the radius or diameter of the semicircle.
Diameter of semicircle = 1 Area of semicircle = Pi/8 Area of triangle = 0.25 Area outside triangle = (Pi/8) - 0.25 = 0.1427 (rounded to 4th decimal).
Area = 50.265 cm2Circumference = 25.132 cm
64 pi
Perimeter of a semicircle is the length of the half-circle plus the diameter. The whole circle would have a length of diameter times pi, but since it's only half... Perimeter of semicircle = (1/2*pi*D) + D
Yes, you can.
Diameter = Radius * 2 In this case, radius = 8 cm so diameter = 16 cm
The radius is always exactly half of the diameter, so if the radius is 8 cm, then the diameter is 16 cm.
The formula for the area of a circle is: A = pi r2 where r is the measure of the radius. If the diameter of a circle is 8 cm, then the radius is half of that measure or 4 cm. Plug that into the formula and use 3.14 to approximate pi. A = 3.14(4)2 A = 3.14(16) Area is approximately 50.24 square cm.
Radius = Diameter / 2 In this case, diameter = 8 cm so radius = 4 cm