Circles and Polygons

The number of sides in a heptagon.

If $ABCDE$ is a regular pentagon, what is the value of $x$ in the figure below?

If the radius of the circle is $25$ units, find the circumference of the circle ( in units ). (Take $\pi = 3.14$)

Show that in a parallelogram the opposite sides are equal.

Form the diagram shown, the letter of the line that are tangent to the circle.

A closed figure that has curvilinear boundary is called as circle.

The radius of the circle is $2 \mathrm{cm}$. If its diameter is $k \mathrm{cm}$ then find $k$.

The radius of the circle is $9 \mathrm{cm}$. Find its diameter in $\mathrm{cm}$.

The radius of the circle is $15 \mathrm{cm}$. Find its diameter in $\mathrm{cm}$.

Find the diameter of the following radius.

$11 \mathrm{mm}$

Find the diameter of the following radius.

$20 \mathrm{cm}$

Find the diameter of the following radius.

$15 \mathrm{cm}$

Find the diameter of the following radius.

$7 \mathrm{cm}$

Find the radius of the circle if the length of the diameters are given as follows.

$102 \mathrm{mm}$

Find the radius of the circle if the length of the diameters are given as follows.

$94 \mathrm{cm}$

Find the radius of the circle if the length of the diameters are given as follows.

$36 \mathrm{cm}$

Find the radius of the circle if the length of the diameters are given as follow.

$20 \mathrm{cm}$

Diameter of a circle is also a chord.

Find the radius of the circle. If its diameter is $42 \mathrm{cm}$.

Find the radius of the circle in $\mathrm{cm}$. If its diameter is $38 \mathrm{cm}$.