2006-12-22 06:31:07 · 4 answers · asked by wicked 1 in Science & Mathematics ➔ Mathematics
a = 12
b = 22
c = 18
First figure the semi-perimeter:
s = (a + b + c) / 2
s = (12 + 22 + 18) / 2
s = 52 / 2
s = 26
Heron's formula:
A = sqrt( s (s-a)(s-b)(s-c) )
A = sqrt( 26 (26 - 12)(26 - 22)(26 - 18) )
A = sqrt( 26 * 14 * 4 * 8 )
A = sqrt( 11,648 )
A = 107.925901 sq. inches
2006-12-22 06:38:01 · answer #1 · answered by Puzzling 7 · 1⤊ 0⤋
12+22+18+3=15
2006-12-22 15:33:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋
if s is the sem perimeter
s=(12+22+18)/2=26
according to hero's formula
area=[s(s-a)(s-b)(s-c)]^1/2 the root of this
=8 into the root of 188
2006-12-26 06:49:17 · answer #3 · answered by karthik p 1 · 0⤊ 0⤋
first find the value of "s"
s= a+b+C/2
12+18+22/2
52/2
s=26
now substitute in this formula
square root of s(S-a)(s-b(s-c)
a=12
b=22
c=18
2006-12-22 14:37:02 · answer #4 · answered by dreamgirl 2 · 0⤊ 0⤋