hank correctly calculated 800 inches as the length of the diagonal of square with 20 inch sides which of following is closet to the length of diagonal in inch
?
20 or 30 or 40 or 60 or 80 ?
2007-04-17 11:21:55 · 4 answers · asked by * Al 7aZeeN 4 eVeR * 1 in Science & Mathematics ➔ Mathematics
sqrt(20^2+20^2+2^2) equals about 28 so the closest answer would be 30.
2007-04-17 11:29:19 · answer #1 · answered by bruinfan 7 · 0⤊ 0⤋
hi
diagonal^2 = 800 inches^2 (= 20^2 + 20^2)
diagonal close to 30 inches
bye
2007-04-17 11:28:05 · answer #2 · answered by railrule 7 · 0⤊ 0⤋
A square of 20inches doesn't have an 800 inch diagonal.
If the sides are 20 inches then
diagonal^2 = 20^2 + 20^2 = 800
diagonal = sqrt(800) = 28.284 inches
2007-04-17 11:44:29 · answer #3 · answered by anotherbsdparent 5 · 0⤊ 0⤋
using pythagoras' theorem
a^2+b^2=c^2
20^2+20^2=x^2=800
x=800^1/2=28.28...
which is closer to 30 inches
2007-04-17 11:32:32 · answer #4 · answered by Anonymous · 0⤊ 0⤋