Question

?? “solve the missing elements for each problem. use 3.14 for area

Answer 1

Problem 4:

Radius = 11 cm.

Circumference = 69.08 cm.

Problem 5:

Radius = 14 mm.

Circumference = 87.92 mm.

Problem 6:

Radius = 9 inches.

Circumference = 56.52 inches.

Problem 7:

Diameter = 32 ft.

Circumference = 100.48 ft.

Problem 8:

Diameter = 26 yards.

Circumference = 81.64 yards.

Problem 9:

Diameter = 12 cm.

Circumference = 37.68 cm.

Explanation:

Problem 4:

Given:

Diameter GH = 22 cm

We need to find the radius EF and Circumference of the circle.

Now radius is given by half of the diameter

Also Circumference is given by π times diameter.

Radius EF =
`(1)/(2)* Diameter = (1)/(2)* 22 = 11 \ cm`

Circumference =
`\pi * Diameter = 3.14 * 22 = 69.08\ cm`

Hence Radius = 11 cm

Circumference = 69.08 cm.

Problem 5:

Given:

Diameter OP = 28 mm

We need to find the radius MN and Circumference of the circle.

Now radius is given by half of the diameter

Also Circumference is given by π times diameter.

Radius MN =
`(1)/(2)* Diameter = (1)/(2)* 28 = 14 \ mm`

Circumference =
`\pi * Diameter = 3.14 * 28 = 87.92\ mm`

Hence Radius = 14 mm

Circumference = 87.92 mm.

Problem 6:

Given:

Diameter EF = 18 inches

We need to find the radius CD and Circumference of the circle.

Now radius is given by half of the diameter

Also Circumference is given by π times diameter.

Radius CD =
`(1)/(2)* Diameter = (1)/(2)* 18 = 9 \ in`

Circumference =
`\pi * Diameter = 3.14 * 18 = 56.52\ in`

Hence Radius = 9 inches.

Circumference = 56.52 inches.

Problem 7:

Given:

Radius GH = 16 ft

We need to find the Diameter CD and Circumference of the circle.

Now Diameter is given by twice the radius.

Also Circumference is given by π times diameter.

Diameter KJ =
`2 * radius = 2 * 16 = 32 \ ft`

Circumference =
`\pi * Diameter = 3.14 * 32 = 100.48\ ft`

Hence Diameter = 32 ft.

Circumference = 100.48 ft.

Problem 8:

Given:

Radius LM = 13 yards

We need to find the Diameter CD and Circumference of the circle.

Now Diameter is given by twice the radius.

Also Circumference is given by π times diameter.

Diameter NO =
`2 * radius = 2 * 13 = 26 \ yards`

Circumference =
`\pi * Diameter = 3.14 * 26 = 81.64\ yards`

Hence Diameter = 26 yards.

Circumference = 81.64 yards.

Problem 9:

Given:

Radius NO = 6 cm

We need to find the Diameter CD and Circumference of the circle.

Now Diameter is given by twice the radius.

Also Circumference is given by π times diameter.

Diameter PQ =
`2 * radius = 2 * 6 = 12 \ cm`

Circumference =
`\pi * Diameter = 3.14 * 12 = 37.68\ cm`

Hence Diameter = 12 cm.

Circumference = 37.68 cm.