Find the area of the given octagon.

Top surface of a raised platform is in the shape of a regular octagon as shown in the figure.Find the area of the octagonal surface.

Find the area of the triangle formed by joining the mid-points of the sides of the triangle whose vertices are (0, -1), (2, 1) and (0, 3). Find the ratio of this area to the area of the given triangle.

Find the area of the triangle formed by joining the mid-points of the sides of the triangle whose vertices are (0, -1), (2, 1) and (0, 3). Find the ratio of this area to the area of the given triangle.

In the given figure, O is the centre of circle such that diameter AB = 13 cm and AC 12 cm. BC is joined. Find the area of the shaded region. ( pi = 314 )

Find the area of the region bounded by the parabola y=x^2" and "y= |x| .

In the given figure, a chord AB of the circle with centre O and radius 10 cm, that subtends a right angle at the centre of the circle. Find the area of the minor segment AQBP. Hence find the area of major segment A angle lBQA.

Find the area of the shaded region in the figure, where ABCD is a square of side 14cm OR Find the area of the shaded regions. Given PQRS a square of sides 14 cm.