Question

Find the missing angle

Answer 1

All angles of a triangle should add up to 180°
To get X start at 180° and subtract the two known angles.
Then what number is left is your answer Angle x = 35 :)

Answer 2

Answer is 35 degrees.

The rule of a triangle is all three angles will add up to 180 degrees.

We know two angles are 67 and 78.

180 - 67 - 78 = 35

Your third angle is 35.