Answer:
Step-by-step explanation:
Sides are 120 m, 170 m, 250 m
41.
S is the semi-perimeter and is equal to:
- s = (a + b + c)/2 = (120 + 170 + 250)/2 = 270 m
Correct choice is D
42.
The area is easy to calculate using the Heron's formula, since we have all three side lengths known.
Correct choice is B
43.
Perimeter is:
- P = a + b + c = 120 + 170 + 250 = 540 m
Correct choice is A
