one angle os a triangle measures 120 degrees the other two angles are congruent

Question

its a reiangle with three sides i have to find out the other sides theyre congruent and the otherside is 120

Answer 1

Then using the sine theorem you can get the other side:

120/sin120=L/sin30

L=120*(1/2)/(√3/2)=

L=120/√3 = 120* √3/3 = 40*√3

length of each one of the congruent sides.

Answer 2

All triangles equal 180 degrees. Subtract 120 degrees from 180 degrees and that leaves 60 degrees. Divide 60 degrees by 2 and that leaves 30 degrees for each of the two angles.