find the area of triangle whose two sides of which are 18cm and 17cm and the perimeter is 45cm
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The answer is approximately is 77.4
Might it helps you....
Might it helps you....
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sharmanirneet:
thanks for help
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Find the 3rd side:
Perimeter = side 1 + side 2 + side 3
45 = 18 + 17 + side 3
side 3 = 10 cm
Find the semi-perimeter:
Perimeter = 45 cm
semiperimeter = 45 ÷ 2 = 22.5 cm
Find the area:
Area = √p(p- a)(p - b)(p-c)
area = √22.5(22.5 - 18)(22.5 - 17)(22.5 - 10) ≈ 83 cm²
Answer: The area is 83cm²
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