Two angles of an isosceles triangle are in the ratio of 1:4. What are the possible angles' measures?
2007-02-11 23:35:34 · 4 answers · asked by 2 days after my B day :) 2 in Science & Mathematics ➔ Mathematics
x+x+4x=180 where x,x,4x are supposed as the angles of that triangle..and sum of angles in a triangle is 180..
so 6x=180
so..x=30...so..the angles are
30,30,120
2007-02-11 23:40:22 · answer #1 · answered by Div 2 · 0⤊ 0⤋
There are 3 angles, two of them are the same so you can have
the apex as the 1 and the two base angles as 4 each.. 1+4+4 = 9
Then (sum of interior angles) 180/9 = 20, 20*4=80 leaving
20,80,80;
OR you can have the apex as the 4 and the two base angles as the 1's... 4+1+1 = 6; 180/6 = 30, 30*4=120 leaving
120, 30,30
2007-02-12 07:42:16 · answer #2 · answered by ♥Tom♥ 6 · 1⤊ 0⤋
if one is X the other two will be [180-X] / 2
2007-02-12 07:41:21 · answer #3 · answered by sas35353535 7 · 0⤊ 0⤋
one angle is 20degrees & other is 80 degrees
2007-02-12 07:40:25 · answer #4 · answered by kanni 1 · 0⤊ 0⤋