circles and areas related to circles class 10

The region bounded by two radii and corresponding arc of a circle is

• A) Segment

• B) Sector

• C) Area

• D) Perimeter

The region bounded by chord and corresponding arc of a circle is

• A) Perimeter

• B) Sector

• C) Area

• D) Segment

Angle of the sector is 90°then the ratio of Area of circle to area of sector is

• A) 1:4

• B) 1:2

• C) 4:1

• D) 2:3

If the sum of areas of two circles with radii R₁ and R₂ is equal to the area of the circle of radius R then 

• R₁ + R₂ = R
• (R₁)² + (R₂)² = R²
• R₁ + R₂ < R
• (R₁)² + (R₂)²  R²

• a)
• b)
• c)
• d)

• a

• b

• c

• d

What is the area of sector of a circle with central angle  $60\degree$  

•  $\pi r^2$  

•  $2\pi r$  

•  $\frac{\pi r^2}{6}$  

•  $\frac{\pi r^2}{2}$  

Say 'TRUE' or 'FALSE'
The distance traveled by a circular wheel of diameter d cm in one revolution is 2πd cm

• TRUE
• FALSE

Area of circle is 154cm², and Area of minor sector is 7.7cm², then calculate area of major sector of circle.

• A) 145 cm²

• B) 146.3 cm²

• C) 77 cm²

• D) 147 cm²

The radii of two concentric circle are 7cm and 14cm. What is the ratio of their areas?

• A) 1:4

• B) 1:2

• C) 4:1

• D) 2:3