Question

Could somone please help me with this problem

Answer 1

Well we know that
105° +z should equal 180°
So 105° +z=180°
z=180° -105°
z=75°
Now we only need the y
All of the inside angles together should equal 360°
102° +83° +75° +y=360°
260° +y=360°
y=360° -260°
y=100°

Answer 2

length times weight times height should give you the answer