Question

An exterior angle of a triangle is 120 and one of the interior opposite angles is 20. Find the other two angles of the triangle.

Answer 1

one opposite interior angle =20
let other interior opposite angle be x.

we know that sum of opposite interior angles of triangle =exterior angle

so,20+x=120
x=120-20
x=100

now,sum of all angles of triangle =180

so,let third interior angle be y
then,20+100+y=180
120+y=180
y=180-120
y=60

so,one angle of triangle =20degree
other angle =100degree
And third angle =60degree

Answer 2

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