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Mathematics
Area of circle
Find the area of a sector of a circle with radius 6 cm if the angle of the sector is $60^\circ$.
Mathematics
Area of circle
There is an equilateral triangle with each side 4 and a circle with the centre on one of the vertices of that triangle. The arc of that circle divides the triangle into two parts of equal area. How long is the radius of the circle?

Mathematics
Area of circle
A circular disc has a diameter of 24 centi-meters. What is the area of the disc?
Mathematics
Area of circle
The diameter of a circle is $40$ metres. What is the area of a circle in terms of $\pi$?
Mathematics
Area of circle
The circumference of the circle is $11\pi$ inches . What is the area in square inches of the circle?
Mathematics
Area of circle
A circular plate has a circumference of $25.7$ inches. What is the area of this plate?
Mathematics
Area of circle
What is the approximate area of a circle with a radius of $1.5$?
Mathematics
Area of circle
Find the area of a circle whose radius is $14\,cm$.
Mathematics
Area of circle
Calculate the area of a circular ring whose outer and inner radii are $12$ and $10\ cm$.
A.$118.16\ cm^{2}$
B.$128.16\ cm^{2}$
C.$138.16\ cm^{2}$
D.$148.16\ cm^{2}$
Mathematics
Area of circle
On a square cardboard sheet of area $784{\text{ c}}{{\text{m}}^2}$ , four congruent circular plates of maximum size are placed such that each circular plate touches the two plates and each side of the square sheet is tangent to two circular plates. Find the area of the square sheet not covered by the circular plates.
(A) $154{\text{ c}}{{\text{m}}^2}$
(B) $168{\text{ c}}{{\text{m}}^2}$
(C) ${\text{616 c}}{{\text{m}}^2}$
(D) ${\text{284 c}}{{\text{m}}^2}$

Mathematics
Area of circle
The radius of a circle is stated as $2.12cm$. Its area should be written as
a). $14c{m^2}$
b). $14.1c{m^2}$
c). $14.11c{m^2}$
d). $14.1124c{m^2}$

Mathematics
Area of circle
Tick the correct answer in the following and justify your choice: if the perimeter and area of a circle are numerically equal, then the radius of circle is
A.2 units
B. $\pi$units
C.4 units
D.7 units

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