geometry word problem
2006-09-23 23:39:37 · 4 answers · asked by vencedersonflow 1 in Education & Reference ➔ Standards & Testing
Sum of angles in triangle is always 180º
so
x (first angle) +y (second angle) +z (third angle) =180
y=2x
z=x+20
x+y+z=180
x+2x+x+20=180
4x=180-20
x=160/4
x=40
First angle 40º
Second angle 80º
Third angle 60º
2006-09-23 23:48:29 · answer #1 · answered by no one 6 · 0⤊ 1⤋
The sum of the three angles has to add up 180 degrees, so if angle 1 is x, we have:
x + 2x + (x+20) = 180
4X +20 = 180
4X = 160
x = 40
1st angle is 40 degrees
2nd angle is 80 degrees
3rd angle is 60 degrees
Good luck!
2006-09-23 23:50:53 · answer #2 · answered by Chess 4 · 0⤊ 0⤋
let the ist angle be x
therefore 2nd angle= 2x
therefore 3rd angle=x+20
x+2x+(x+20)=180(the sum of all the angles is 180)
4x +20 = 180
4x = 180 -20
4x=160
x=40
therefore the ist angle is 40
2006-09-23 23:51:04 · answer #3 · answered by freakyfuss 2 · 0⤊ 0⤋
40 degrees
2006-09-23 23:47:38 · answer #4 · answered by vintageprincess72 4 · 1⤊ 1⤋