Question

summary of chapter area related to circles class 10​

Answer 1

Answer:

Circumference of a Circle or Perimeter of a Circle

The distance around the circle or the length of a circle is called its circumference or perimeter.

Circumference (perimeter) of a circle = πd or 2πr,

where d is a diameter and r is a radius of the circle and π = 227

Area of a circle = πr2

Area of a semicircle = 12 πr2

Area of quadrant = 14 πr2

Perimeter of a semicircle:

Perimeter of a semicircle or protractor = πr + 2r

Areas Related To Circles Notes CBSE Class 10 Maths

Area of the ring Formulas :

Area of the ring or an annulus = πR2 – πr2

= π(R2 – r2)

= π (R + r) (R – r)