The formula to find the area of a triangle is:

Plug in what we know:

Multiply:
The angles of a triangle will always add up to be 180 degrees total.
x + 82 + x + 82 + 40 = 180
2x + 164 + 40 = 180
2x + 204 = 180
Subtract 204 from both sides.
Think of it as “180 + (-204)”
2x = -24
Divide each side by 2.
x = -12
Answer: x = -12
Commutative property of multiplication
5) all you have to do is calculate which would be 2.9166...
6) 65.898
Answer:
Quadrant 4
Step-by-step explanation: