2007-05-30 08:39:26 · 4 answers · asked by Natasha Lacey 1 in Science & Mathematics ➔ Mathematics
The base of a cone is only just a circle. To find the surface are of the base of a cone, you are only finding the area of a circle. The formula for the area of a circle is A = πr². This means that you multiply pi (3.14) times the radius squared (half of the diameter or half of the width of the diameter).
SAMPLE EQUATION:
Find the area of this circle if the diameter measures 6 cm.
To solve the equation, first you would need to find the radius. The radius is half of the diameter, so divide 6 cm by 2. Your answer is 3. Therefore, your radius is 3 cm.
Now, fit your radius answer into the rest of the equation. The equation for the area of a circle is A = πr². Square your radius. 3x3 = 9. Now you are left with A=9π.
If your teachers allow you to keep pi in the equation without solving it out, then this is your answer. If you teachers require you to multiply the whole problem out, then you would just simply multiply 9 by pi (3.14)
9 x 3.14 = 28.26
Your answer is 28.26 cm ²
2007-05-30 09:01:56 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Surface Area of the base of a Circular Cone is Ï(r²).
Surface Area of the entire cone is 1/3(Ab)(H)
2007-05-30 08:48:41 · answer #2 · answered by Jake 2 · 0⤊ 0⤋
Base of a cone is a circle, A = Ïr².
2007-05-30 08:42:44 · answer #3 · answered by Philo 7 · 0⤊ 1⤋
it's simply finding the area of a circle which = pie x r2 (squared)
lol! i can't do ne of the funky symbols
2007-05-30 11:03:29 · answer #4 · answered by Anonymous · 0⤊ 0⤋