Area of a Circle Donut From Inner Radius and Area to Outer Radius (Equation) (Level 1)

This math topic focuses on understanding and calculating the area of a "circle donut". More specifically, it requires finding the outer radius of the donut, given its area and inner radius. This relates to the broader field of Geometry - Circle Area, Sectors, and Donuts. Questions present multiple choice answers for students to select from, enhancing their problem-solving skills in geometrical calculations related to circle areas.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

Area of a Circle Donut From Inner Radius and Area to Outer Radius (Equation) Worksheet

Math worksheet on 'Area of a Circle Donut From Inner Radius and Area to Outer Radius (Equation) (Level 1)'. Part of a broader unit on 'Geometry - Circle Area, Sectors and Donuts - Intro' Learn online: app.mobius.academy/math/units/geometry_circles_sector_donut_area_logic_intro/

1

Find the outer radius of the donut with an area of 77 π and an inner radius of 2

a

9

b

17

c

8

d

5

e

1

f

11

2

Find the outer radius of the donut with an area of 9 π and an inner radius of 4

a

2

b

4

c

5

d

7

e

14

f

11

3

Find the outer radius of the donut with an area of 20 π and an inner radius of 4

a

8

b

3

c

12

d

6

e

10

f

9

4

Find the outer radius of the donut with an area of 16 π and an inner radius of 3

a

4

b

10

c

9

d

7

e

3

f

5

5

Find the outer radius of the donut with an area of 5 π and an inner radius of 2

a

10

b

11

c

6

d

3

e

7

f

12

6

Find the outer radius of the donut with an area of 63 π and an inner radius of 1

a

8

b

10

c

13

d

17

e

5

f

16

7

Find the outer radius of the donut with an area of 40 π and an inner radius of 3

a

3

b

1

c

7

d

13

e

11

f

6