Homework Help: math - grade 7

Posted by deb on Thursday, January 24, 2013 at 12:36am.

determine the diameter of a circle with a radius of 4.26m.

determine the area of the circle with diameter is 8mm.

math - grade 7 - Bosnian, Thursday, January 24, 2013 at 1:10am
d = 2 r

d = 2 * 4.26 = 8.52 m

A = d ^ 2 pi / 4

A = 8 ^ 2 pi / 4

A = 64 pi / 4

A = 16 pi mm ^ 2

A = 16 * 3.14 = 50.24 mm ^ 2
math - grade 7 - Brooke, Thursday, January 24, 2013 at 7:22pm
22

Related Questions

math - the number of noncollinear points needed to determine a circle Two. The ...
Math - Cindy is making labels for CDs. The diameter of each CD is 12 inches. In ...
pre calc - EAch of 3 circles touch the other 2. Circle A=radius 8cm Circle B=...
8th grade math - The radius of circle M is 3 times the radius of circle P. If ...
area of circle - My circle has a radius of 8ft. What is the distance of the ...
Physics - you measure the diameter of a circle then you calculate the radius of ...
math - suppose you copy the circle using a size factor of 150%.what will bet he ...
8th grade math - circle A has a raduis that is twice the length og the raduis of...
math - Find the area of the partial circle, use 22/7 for pi. 1.) radius = 27 cm ...
MATH HELP PLEASE - You are given two different circles. The diameter of the ...

For Further Reading

First Name:
School Subject:
Answer: