AREA OF CIRCLE
WHY IT IS πr²
prostudypk.com
Cut the Circle and Open It
π r (half the circumference)
r
Area = πr × r = πr²
π r
length (base)
r
width (height)
π r²
area
1. Formulas
Area = π r²
Circumference = 2 π r
2. Example
r = 7 cm → A = 22/7 × 49 = 154 cm²
C = 2 × 22/7 × 7 = 44 cm
3. Remember
The more pieces,
the shape becomes a rectangle
MATRIC MATHS · MENSURATION · PUNJAB BOARDS
‹ Labs
↺
❚❚
1×
Next ›