thanks
2007-10-07 03:53:58 · 6 answers · asked by parev 1 in Science & Mathematics ➔ Mathematics
9.817
2007-10-07 03:57:25 · answer #1 · answered by Mr. Self Destruct 3 · 0⤊ 0⤋
It is half the area A of the full circle which is A = Ïd²/4, where d is the diameter.
Thus the area S of the semicircle is S = (1/2)A = (1/8)Ïd²
So in this case S = 25Ï/8 = 9.8175
2007-10-07 10:57:37 · answer #2 · answered by Bazz 4 · 0⤊ 0⤋
You will need to know the following:
semi-circle = 1/2 circle area
circle area = Ï r^2
r = 1/2 diameter
r=1/2(5)=2.5 inch
circle area = 2.5*2.5*Ï=6.25Ï
semi-circle area = (1/2)*6.25Ï=3.125Ï= 9.185 sq. inches
2007-10-07 11:06:11 · answer #3 · answered by 037 G 6 · 0⤊ 0⤋
area of semicircle=half of area of full circle =1/2*pie*d^2/4
=>area=1/2*3.14*5^2/4=9.81sq.inch
2007-10-07 10:58:27 · answer #4 · answered by msg_me 2 · 0⤊ 0⤋
Well, if the whole circle has an area of Ï*R*R, which is 3.1415*2.5*2.5, just divide the result by 2 and you have the answer.
2007-10-07 11:01:09 · answer #5 · answered by misen55 7 · 0⤊ 0⤋
its 2.5x2.5x3.14/2=6.25x1.57=
answer is=
9.8125
2007-10-07 11:01:38 · answer #6 · answered by mad-dog 2 · 0⤊ 0⤋