Question

find the angles of the triangles in the following figures​

Answer 1

Answer :

"B" one is :-

65 degree

Answer 2

Answer:

Angle BAC = 50° (given)

Angle ACD = 115° (Given)

Hence,

Angle ACB = 180 - 115 ( Linear pair )

$180 - 115 = 65$

Angle ACB = 65°

Now,

Angle BAC + Angle ACB + Angle ABC = 180° ( Angle sum property )

Let's assume that x = Angle ABC

$50 + 65 + x = 180$

$115 + x = 180$

$x = 180 - 115$

$x = 65$

Hence Angle ABC = 65°