Question

In ΔXYZ, ∠X=25°, ∠Y=78° then ∠Z = ___________ (53°, 67°, 77°, 103°)​

Answer 1

Answer:

in triangle sum of all interior angles is 180°

<x+<y+<z=180°

25°+78°+<z=180

103°+<z=180°

<z=180°-103°

=77°