Answer:
Use Heron's formula; see below.
Step-by-step explanation:
Use Heron's formula.
Let the sides of the triangle have lengths a, b, and c.


Example:
A triangle has side lengths 3, 4, and 5 units.
Find the area of the triangle.








B, x=12 because 140-80=60, 60/5=12
I believe the first group would have 36 and the second group would have 12
Answer:
m is the right answer
Step-by-step explanation:
no step hope yu mark me as brainliest