CBSE Class 10-Mathematics: Chapter –12 Areas Related to Circles Part 10
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Question 26:
In figure, a square OABC is inscribed in a quadrant OPBQ. If , find the area of the shaded region.
In Figure, a Square OABC is Inscribed in a Quadrant OPBQ
Answer:
Area of shaded region Area of quadrant Area of square OABC
Question 27:
AB and CD are respectively arcing of two concentric circles of radii and and centre O (see figure). If , find the area of the shaded region.
Area of Shaded Region
Answer:
Area of shaded region Area of sector OAB Area of sector OCD
Question 28:
In figure, ABC is a quadrant of a circle of radius and a semicircle is drawn with BC as diameter. Find the area of the shaded region.
Pythagoras Theorem
Answer:
In right triangle [Pythagoras theorem]
Radius of the Semicircle
Radius of the semicircle
Required area Area BPCQB
Area BCQB – Area BCPB
Area BCQB – (Area BACPB – Area BAC)