I don't get this math problem for my homework. Could you show me how you solve it? Please and thanks! It's under the topic of "Calculating the Radius or Diameter of a Circle." This is the problem:
Kim was playing checkers. While waiting for a turn, Kim rolled a game piece one complete turn and measured the distance. The checker rolled 4.4 cm. What is the diameter to the nearest tenth?
I don't get how to solve for that. Like in the other problems, it would say, the circumference is... or the area is...so I don't get how to do this. Please help!!!
2007-01-23 08:51:21 · 5 answers · asked by Dee 6 in Education & Reference ➔ Homework Help
Circumference is 2(pi)r, what she has measured by rolling the checker one complete time is the circumference of the checker.
r is the radius and this is measured from the center of the circle to the outside. The diameter is measured through the center all the way from one side to the other side; so 2r is D.
C=2(pi)r
therefore
4.4 = 2(pi)r
4.4 = 2(3.14)r
4.4 = 6.28r
Divide both sides by 6.28
0.7 = r
Now diameter is 2r so the diameter is 1.4
2007-01-23 09:05:38 · answer #1 · answered by Ron H 6 · 1⤊ 0⤋
Hi Roxy, since the checker rolled for one whole turn, the distance which it rolled is its circumference. You know that the ratio of the diameter to the circumference is pi so you divide 4.4 by pi and get 1.4 cm
2007-01-23 16:58:15 · answer #2 · answered by CanProf 7 · 2⤊ 0⤋
the circumference is 4.4 cm, figure the diameter of the checker from there
2007-01-23 16:57:53 · answer #3 · answered by anothersomeonenew 5 · 1⤊ 0⤋
I'm not positive, but i'm assuming it's 4 cm, just round to the nearest tenth
2007-01-23 16:56:47 · answer #4 · answered by monkisrockmisox 3 · 1⤊ 0⤋
well figure it out wut else do u think we should do help u take a bath?! and plus that would b cheatin'...
2007-01-23 16:56:58 · answer #5 · answered by alexis a 1 · 0⤊ 1⤋