2006-07-08 08:00:43 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
36 - 60 - 84
3x + 5x + 7x = 180
15x = 180
x =12
2006-07-08 08:03:50 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Yep the above are correct. 3+5+7=15 so 15 = 180deg.
divide both sides by 15 we get 1 = 12 deg.
3 x 12 = 36
5 x 12 = 60
7 x 12 = 84
The sum of these adds up to 180deg which is the sum of the internal angles of any triangle.
2006-07-08 15:10:50 · answer #2 · answered by brainyandy 6 · 0⤊ 0⤋
Since there are 180 degrees in a triangle and the ratios add up to 15, then 180 / 15 = 12. So multiply each ratio by 12.
36, 60, 84
These add up to 180 degrees, so we must be right!
2006-07-08 15:05:59 · answer #3 · answered by Rich B 3 · 0⤊ 0⤋
36:60:84
using x as the common variable
3x+5x+7x=180(all triangles angles add up to 180 deg)
15x=180
x=12
then multiply 12 by the ratios and you get the above answer
2006-07-08 15:07:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
3x + 5x + 7x = 180
15x = 180
x = 12
3(12) = 36
5(12) = 60
7(12) = 84
36°, 60°, and 84°
2006-07-08 16:12:34 · answer #5 · answered by Sherman81 6 · 0⤊ 0⤋