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`)

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

Area of /_\ABC=70cm^2 and CD=5cm . Find the area of the shaded region.

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 )

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

In the figure BMD is a segment of a circle with centre O and /_BOD=90^@ , BO=OD=40cm . Find the area and perimeter of the shaded region. (Use 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 (i) quadrant OACB,

A sector from teo concentric circle is shown in Fig.14.If the radii of the circles are respectively 3.5 cm and 7 cm,find the area of the shaded region in the figure.

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 )

The area of an equilateral triangle ABC is 17320.5cm^2 .With each vertex of the triangle as center,a circle is drawn with radius equal to half the length of the side of the triangle(seeFig.12.28).Find the area of the shaded region.(use pi=3.14 and sqrt3=1.73205 )