2007-03-27 15:11:56 · 13 answers · asked by sk8rprincess3 1 in Science & Mathematics ➔ Geography
area circle - (pi)r^2
area triangle - 1/2(bh)
circumference of circle - pi(d)
KEY
pi = 3.14159.... etc. etc.
r = radius (1/2 d)
d = diameter
b = base
h = height
and the ^ means an exponent.
2007-03-27 15:15:50 · answer #1 · answered by chief_auto_parts1990 3 · 0⤊ 0⤋
Area of circe= pi x radius squared
Area of triangle= 1/2 x base x hieght
Circumference of circle= 2 x pi x radius
Examples: Area of circle, if the radius is 2 than the area would be 4 x pi because 2 squared is 4
Area of triangle, if the hieght is 3 and the base is 4, than 1/2 times 4 times 3= 6
Circumference of a circle, if the radius is 2 than the circumference is 2 times pi times 2= 4 x pi
2007-03-28 13:55:49 · answer #2 · answered by black_fairy_magic 2 · 0⤊ 0⤋
To find the area of a circle, the formula is area=pi times the radius of the circle squared, or A=pi times r squared. The formula for the circumference of a circle is circumference=pi times the diameter of the circle, or C=pi times d. The area of a triangle is area=1/2 times the base of the triangle times the height of the triangle, or A=1/2bh.
2007-03-27 22:23:22 · answer #3 · answered by Lauren 5 · 0⤊ 0⤋
the area of a triangle= 1/2hxb
that means the height of the triangle times the base or the length divided by two.
the area of a circle= (R)(R)TT
that means the radius squared, or times itself, time pie, which is 3.14. The radius is half of a diameter. The diameter is the distance between one side of the circle to the other.
the circumference= (D)(TT).
That means you must multiply the diameter, the distance between one side of the circle to the other, time pie, which is 3.14. That is how you get pie. I hope this helps you.
2007-03-27 22:22:46 · answer #4 · answered by yoni z 2 · 0⤊ 0⤋
Area of a circle is TT R squared .... 3.14 X the radius(squared).
Area of a triangle is BH/2 .... base X height divided by 2.
Circumference of a circle is 2 TT R ... 2 X 3.14 X radius.
I hope this helps! Good luck!
2007-03-27 22:15:39 · answer #5 · answered by Happy Girl 3 · 0⤊ 0⤋
Area of triangle is 1/2 base x height
Area of circle is Radius squared x pie
Circumference of circle is pie x Diameter
2007-03-27 22:15:24 · answer #6 · answered by Luke S 3 · 1⤊ 0⤋
Area of a circle = pie (3.14 to 2 d.p) x radius squared
Area of a triangle = half (0.5) x the base x the height
Circumfrence of a circle = pie x diameter
2007-03-31 04:40:47 · answer #7 · answered by Christopher G 2 · 0⤊ 0⤋
Area of circle:pi times radius squared. So that means pi times radius times radius
Area of a triangle: multiply height and width and divide by two.
Circumference of circle: pi times diameter
Pi = 3.14...
2007-03-27 22:26:55 · answer #8 · answered by corky555 2 · 0⤊ 0⤋
area of circle is pie *radius*radius,area of triangle is 1/2*base*height,circumference of a circle is 2*pie*radius.
2007-03-27 23:04:47 · answer #9 · answered by akhila k 3 · 0⤊ 0⤋
circumference of a circle is pi times radius squared
2007-03-27 22:17:57 · answer #10 · answered by Anonymous · 0⤊ 0⤋