Shown below is a circle with centre O. The shaded sector has an angle of $280°$ and area $\mathrm{A} {\mathrm{cm}}^2$.

Which of these is the area of unshaded sector?

Raju and his $3$ friends ordered a pizza one night.

Now, the shop from where they bought this, did not cut it into equal pieces. Raju tried to divide it, but the pieces were not equal.  

As a fun game, he decided to measure the central angles formed and draw the pizza on a piece of paper.

He found that the radius of the pizza is $8 \mathrm{cm}$. The drawing of the pizza came out something like this:

The area of the biggest share of pizza (correct to two decimal places) will be [assume $\mathrm{\pi }=\frac{22}{7}$]

In a fair, a giant wheel was fixed. The giant wheel is in the shape of a circle divided into $12$ equal sectors as shown in the diagram below.

The highest point of the wheel is $150 \mathrm{m}$ above the ground level and the boarding platform of the wheel is $10 \mathrm{m}$ above the ground level. Based on the given information, answer the following question by choosing the correct option from the given four options in the question:

The perimeter of each sector of the circle is

Fibonacci's sequence is a pattern in which each number is obtained by adding the previous two numbers (except the first $2$ numbers).

The pattern is $0, 1, 1, 2, 3, 5, 8, 13...$

Shown below is a representation of the first few terms of the Fibonacci sequence in a unit square grid. The terms represent the side lengths of the squares.

What is the area of the shaded sector?

$ABCD$ is a square of side $7 \mathrm{cm}$ and semi-circles are drawn with each side of the square as diameter, thereby forming four similar petals as shown in the adjoining figure. Find the cost of making design on the petals at the rate of $₹12$ per square centimetre. 

In the figure, seg $\mathrm{AB}$ is a chord of a circle with centre $\mathrm{P}.$ If $\mathrm{PA}=8 \mathrm{cm}$ and distance of chord $\mathrm{AB}$ from the centre $\mathrm{P}$. is $4 \mathrm{cm},$ find the area of the shaded portion.

$ABCD$ is a rectangle in which $AB:BC=2:1$. $M$ is midpoint of $AB$. $MD$ and $MC$ are one fourth of the circles with centres at $A$ and $B$ respectively. Find the ratio of the area of the rectangle $ABCD$ and the shaded portion.

Three circles each of radius $3.5 \mathrm{cm}$ are drawn such a way that each of them touches the other two. Find the area enclosed between these circles.