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Mathematics 8 Online
OpenStudy (myschf711):

The diameter of a trampoline is 12 ft. The diameter of its metal frame is 14 ft. What is the length in feet of the metal frame?

OpenStudy (kt7779):

find the radius of a circle with a diameter of 14

OpenStudy (myschf711):

To find the radius is D ÷ 2 right?

OpenStudy (anthonyym):

Yes, D/2 is the radius.

OpenStudy (anthonyym):

It asks for the length of the metal frame, in other words the perimeter (circumference, since a trampoline is a circle). Circumference of a circle is pi*diameter, or pi*2*radius.

OpenStudy (robtobey2):

Pi * 14

OpenStudy (robtobey2):

The circumfrence of a circle is Pi times the circle's diameter.

OpenStudy (myschf711):

Thank you all for your help. I think the formula has finally sunken in.

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