Arun Sharma Solutions for Exercise 1: Review Test

In the given figure, $O$ is the centre of the circle; angle $BCO=mº$, angle $BAC = nº$.then which of the following is correct?

Find the area of shaded portion given that the circles with centres $O$ and $O^1$ are $6 cm$ and $18 cm$ in diameter respectively and $ACB$ is a semi circle.

There are two spheres and one cube. The cube is inside the bigger sphere and the smaller sphere is inside the cube. Find the ratio of surface areas of the bigger sphere to the smaller sphere?

In the adjoining figure, a star is shown. What is the sum of the angles $P, Q, R, S$ and $T$?

In the figure given below, $PS$ & $RT$ are the medians each measuring $4 cm$. $△PQR$ is right-angled at $Q$. What is the area of the $△PQR$?

The area of the largest triangle that can be inscribed in a semi-circle whose radius is:

$R$ is $O$ is the center of the circle having radius $\left(OP\right) = r. PQRSTU$ is a regular hexagon and $PAQBRCSDTEUFP$ is a regular six-pointed star.

Find the perimeter of hexagon $PQRSTU$.

In the given figure, it is given that $\angle C=90°, AD = DB, DE$ is perpendicular to $AB= 20$, and $AC = 12$. The area of the quadrilateral $ADEC$ is: