2006-09-23 05:25:51 · 8 answers · asked by vencedersonflow 1 in Education & Reference ➔ Standards & Testing
let the 3rd angle be X degrees.
the 2nd angle = 4X degrees.
since sum of interior angles in a triangle = 180,
20+X+4X=20+5X=180
5X=160
X=32 degrees.
2006-09-23 05:40:57 · answer #1 · answered by J S 3 · 0⤊ 0⤋
Do you mean in a circle or in a triangle? 20+4(20)=20+80=100. A triangle has 180, and 180-100=80. A circle has 360, and 360-100=260. As you see, the third angle in a triangle is 80 degrees, and the third angle in a circle is 260 degrees.
2006-09-23 07:14:49 · answer #2 · answered by miyuki & kyojin 7 · 0⤊ 0⤋
20 = The angle we know
x = The third angle
4x = The second angle
20+x+4x = 180 degrees
20+5x = 180 degrees
5x=180 - 20 = 160 degrees
x=160/5=32 degrees (the third angle is 32 degrees)
4 X 32 = 128 degrees (the second angle is 98 degrees)
(To prove the result: 20 + 32 + 128 = 180 degrees)
2006-09-23 05:54:39 · answer #3 · answered by Zef Z 1 · 0⤊ 0⤋
Total of all angles in a triangle equals 180 degrees
assuming that a, b, c are each angle of triangle
a+b+c=180
in your question one angle is 20, lets say a=20
also in you question the second angle is four times the third angle
lets assume second angle is b and third angle is c
that makes 4b=c
substitue the above in
a+b+c=180
20+b+4b=180 (as a=20, and c=4b)
20+5b=180
5b=180-20
5b=160
b=160/5
b=32
thats your answere
2006-09-23 05:49:13 · answer #4 · answered by Anonymous · 0⤊ 0⤋
a=20 b=4c a+b+c=180 (its a triangle rite?) 20+b+c=180
b+c=160
b=4c
b/4=c
120/4=30 120+30+20 =170 sO THATS NOT IT
124/4=31 124+31+20 = 175 so thats not it
128/4= 32 128+32+20 = 180 ******ding ding ding******!!!!!
3angle(there) ^ =s 32
2006-09-23 05:39:24 · answer #5 · answered by x1yofuzzy1x 4 · 0⤊ 0⤋
68 degrees. 360 minus 20 equals 340. 340 divided by 5 equals 68. (divide by 5 because 4&1 equals 5)
2006-09-23 05:38:05 · answer #6 · answered by kzapp 4 · 0⤊ 0⤋
let the sum of angles=180
20+4x+x=180
5x=160
x=160/5
=32
2006-09-23 22:17:28 · answer #7 · answered by legolas g/Frederich 4 · 0⤊ 0⤋
96 degress....
2006-09-23 05:35:24 · answer #8 · answered by shradha 1 · 0⤊ 1⤋