Area of a Circle

Presentation

•

Mathematics

•

7th Grade

•

Medium

•

CCSS

7.G.B.4

Standards-aligned

Alison Cunningham

Used 498+ times

FREE Resource

3 Slides • 6 Questions

Area of a Circle

Area is the space inside of the circle.

Formula for Area of a Circle: $A=\pi\cdot r^2$

$3.14\left(radius\right)^2$

Multiple Choice

Which of these do I need to find the area of a circle?

Diameter

Radius

Circumference

Multiple Choice

Which of these is the correct formula for the AREA of a circle?

$C=\pi d$

$A=\pi\cdot r^2$

$C=2\cdot\pi\cdot r$

Multiple Choice

What is the area of a circle with a radius of 8cm?

A=\pi\cdot r^2

200.96

25.12

50.24

Multiple Choice

What is the area of a circle with a radius of 6cm?

A=\pi\cdot r^2

18.84

113.04

50.24

Multiple Choice

What is the area of a circle with a diameter of 8 in? (Remember that you need the radius...not diameter)

A=\pi\cdot r^2

200.96

113.04

50.24

Multiple Choice

What is the area of a circle with a diameter of 18 in? (Remember that you need the radius...not diameter)

A=\pi\cdot r^2

1017.36

254.34

56.52

Real Life Example:

How could area help me in this yard picture?

Area of a Circle

Area is the space inside of the circle.

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