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iVinArrow [24]
4 years ago
9

1. Find the area and perimeter of the triangle. 16 cm 20.9 am 27 cm

Mathematics
1 answer:
Andrei [34K]4 years ago
7 0

Answer:

Perimeter = 63.9 cm.

Area = 166.96 cm^2 to the nearest hundredth.

Step-by-step explanation:

The perimeter = 16+20.9+27 = 63.9 cm.

To find the area you can use Heron's Formula.

Area = √ [ s(s-a)(s-b)(s-c)]  where  s = the semi-perimeter and a, b and c are the lengths of the 3 sides.

s = 63.9 / 2 =  31.95.

Area of the triangle = √ (31.95(31.95-16)(31.95-20.9)(31.95-27)]

 = 166.96 cm^2.

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W (n) = n^2-n find w (-3)
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Answer:

w(-3) = 12

Step-by-step explanation:

Plug in -3 for n in the equation:

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Next, combine like terms. Note that if there are two negative signs directly next to each other, it becomes a positive sign. Add:

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