Question

Please help me in this question.Tell me if it is good. And if it is not good then do it for me please.

Answer 1

Y = 170, Z = 64.

Explanation:

Since y is the external angle to x, which you got right, it is in fact, 180-10, = 170 degrees. And since z is the external to our unknown angle, that means it is equal to the sum of the other two angles in the triangle. That means z is 54 + 10, which is 64.