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choli [55]
2 years ago
15

Plz help will mark you as brainliest(plz answer 42 and 43​

Mathematics
1 answer:
Lisa [10]2 years ago
3 0

Answer:

  • 41. D,
  • 42. B,
  • 43. A

Step-by-step explanation:

Sides are 120 m, 170 m, 250 m

<h3>41.</h3>

<u>S is the semi-perimeter and is equal to:</u>

  • s = (a + b + c)/2 = (120 + 170 + 250)/2 = 270 m

Correct choice is D

<h3>42.</h3>

The area is easy to calculate using the Heron's formula, since we have all three side lengths known.

Correct choice is B

<h3>43.</h3>

<u>Perimeter is:</u>

  • P = a + b + c = 120 + 170 + 250 = 540 m

Correct choice is A

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