Answer:
68º
Step-by-step explanation:
This is a quadrilateral and all degrees in every quadrilateral have to add up to 360º.
81º + 135º + 76º = 292º
360º - 292º = 68º
Therefore, x = 68º
Answer:1 four
Step-by-step explanation:
this is a triangular pyramid which means it hasa triangle shape base which counts as one and it has one face on each side of the triangular base which is three more so if you addthe one face which is the base and the three sides it gives you four faces
The first angle is 25 degrees
25+75=100
100-20=80
100+80=180