first is 86
we know because of the sum of the interior angles of a triangle being 180, and that 5 + 6 =180
Answer:a=81/2 or 40.5
Step-by-step explanation:
(d1 x d2)/2=a
Answer:
-1
2 * -1 = -2
Then, -2 / 2 = 1
38
Your welcome
