Answer:
a+51=90
a+51+90=180
39
Step-by-step explanation:
hope this helped :)
Answer:
(B) square
Step-by-step explanation:
Square (regular quadrilateral): all four sides are of equal length (equilateral), and all four angles are right angles.
Divide and then multiply by 100
Answer:
x=6
Step-by-step explanation:
Hope this helps if you so please mark me Brainliest I would greatly appreciate it. Peace and Love
