238 MATHEMATICS
- Calculate the area of the designed region in
Fig. 12.34 common between the two quadrants
of circles of radius 8 cm each.
12.5 Summary
In this chapter, you have studied the following points :
- Circumference of a circle = 2 r.
- Area of a circle = r^2.
- Length of an arc of a sector of a circle with radius r and angle with degree measure ✁ is
2
360✂ ✄ ☎r✆- Area of a sector of a circle with radius r and angle with degrees measure ✁ is^2
360
✂ ✄☎r✆- Area of segment of a circle
= Area of the corresponding sector – Area of the corresponding triangle.
Fig. 12.34