In the given figure PQRS is a diameter of a circle `6cm`. The length PQ, QR and RS are equal. Semi-circle are drawn on PQ and RS as diameter. If `PS=12cm`, find the area of the shaded region. (Take `pi=3.14`)

A square OABC is inscribed in a quadrant OPBQ of a circle. If OA=14 cm, find the area of the shaded region.

In the given figure ABC is a right angled triangle where /_A=90^@ . AB=21cm and AC=28cm . Semicircles are described on AB, BC and CA as diameter. Find the area of the shaded portion. ( pi=22/7 )

In the figure APB and AQB are semi-circles and AO=BO . If the perimeter of the figure is 40cm , find the area of the shaded region.

In Fig.12.31,a square OABC is inscribed in a quadrant OPBQ.If OA=20cm,find the area of the shaded region.(use pi=3.14 )

In Fig.12.33.ABC is a quadrant of a circle of radius 20 cm and a semicircle is drawn with BC as diameter. Find the area of the shaded region.

In figure 12 PS is a diameter of a circle whose radius is 6cm . Two pint Q and R are taken on PS such that PQ= QR = RS . Two Semi-circles are drawn with PQ and QS as their respective diameters as shown in the figure. find the perimeter and the area of the shaded region shown in figure. (Take pi=3.14 )

In the given figure AB is a diameter of a semi-circular are AOBC and ABC is a right angled triangle where /_C=90^@ and AC=12cm , BC=16cm . Find the area of the shaded portion. ( pi=3.14 )

If Fig.12.30,OACB is a quadrant of a circle with centre O and radius 3.5 cm.If OD=2 cm.find the area of the(ii)shaded region

AOBPA is a quadrant of a circle of radius 14cm . A semi-circle with AB as diameter is drawn. Find the area of the shaded point. ( pi=22/7 )

In the given figure ABCD is a square whose each side is 14cm . APD and BPC are semi-circles. Find the area of the shaded region.