Solving for Radius

Rewrite this formula and solve for the variable r. C = 2πr

• r = 2π / C

• r = C - 2 - π

• r = C - 2π

• r = C / 2π

Tags

CCSS.HSA.CED.A.4

• 1.57 cm

• 15.7 cm

• 50 cm

• 25 cm

Tags

CCSS.7.G.B.4

_____________ is half of the diameter

• circumference

• center

• radius

• diameter

A formula used to compute the volume, V, of a cylindrical solid is V=πr²h, where r is the radius of the base, and h is the height of the solid. What is the radius, in inches, of a cylindrical solid that has a volume of 144π cubic inches and a height that measures 9 inches. 

• 16

• 12

• 8

• 4

Tags

CCSS.8.EE.C.7B

What is the radius?

• 18

• 72

• 38

• 14

Tags

CCSS.7.G.B.4

How many cookies are there?

• 48 cookies

• 24 cookies

• 8 cookies

• 4 cookies

Tags

CCSS.4.MD.A.2

What is the radius of this circle?

• 18

• 10

• 9

• 8

Tags

CCSS.7.G.B.4

A circle has a circumference of 31.4 cm. What is its radius? (Use π = 3.14)

• 20

• 10

• 5

• 15

Tags

CCSS.7.G.B.4

If the circumference of a circle is 25.12 cm, what is its radius? (Use π = 3.14)

• 6.28

• 3.14

• 10

• 4

Tags

CCSS.7.G.B.4