30 since 80+70=150 180-150=30
Answer:
I think option a is correct answer because consecutive angles are supplementary.
Angles of Elevation and Depression. The angle of elevation of an object as seen by an observer is the angle between the horizontal and the line from the object to the observer's eye (the line of sight).
Answer:
Shapes w/ at least one pair of parallel sides: a, d
No parallel sides: b, c
Shapes w/ at least one obtuse angle: a, c
have a good day. <3
Step-by-step explanation:
Step-by-step explanation:
...x=+2...
...y=-3...
