A circular sheet of paper is divided into two sectors. The central angle of one of them is $160°$. What is the central angle of the remaining sector in degree $\left(°\right)$?

A circular sheet of paper is divided into two sectors. The central angle of one of them is $160°$. These sectors are bent into cones of maximum volume. If the radius of the small cone is $8 \mathrm{cm}$, what is the radius of the other in $\mathrm{cm}$?

A circular sheet of paper is divided into two sectors. The central angle of one of them is $160°$. These sectors are bent into cones of maximum volume. If the radius of the small cone is $8 \mathrm{cm}$, what is the slant height of the cones in $\mathrm{cm}$?

Draw a rectangle of area $12$ square centimetres. Draw a square having the same area.

Chords $AB$ and $CD$ are intersecting at $P$. $AB=10$ centimetres, $PB=4$ centimetres and $PD=3$ centimetres. What is the length of $PA$?

Chords $AB$ and $CD$ are intersecting at $P$. $AB=10$ centimetres, $PB=4$ centimetres and $PD=3$ centimetres. Find the length of $PC$.

In the figure, $ABCD$ is a cyclic quadrilateral. Also, $\angle A+\angle D=210°, \angle D+\angle C=250°$. What is $\angle A+\angle C$?

In the figure, $ABCD$ is a cyclic quadrilateral. Also, $\angle A+\angle D=210°, \angle D+\angle C=250°$. Find the measures of $\angle A$ and $\angle C$.