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 72 π and an inner radius of 3

a

2

b

17

c

13

d

9

e

12

f

11

2

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

a

4

b

10

c

3

d

5

e

7

f

9

3

Find the outer radius of the donut with an area of 27 π and an inner radius of 3

a

8

b

11

c

12

d

1

e

2

f

6

4

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

a

13

b

1

c

6

d

11

e

3

f

7

5

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

a

3

b

10

c

7

d

11

e

12

f

6

6

Find the outer radius of the donut with an area of 32 π and an inner radius of 7

a

10

b

5

c

7

d

8

e

2

f

9

7

Find the outer radius of the donut with an area of 15 π and an inner radius of 1

a

1

b

6

c

4

d

3

e

5

f

10