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maria [59]
3 years ago
9

An equilateral triangle has an apothem measuring 2.16 cm and a perimeter of 22.45 cm.

Mathematics
2 answers:
MrRissso [65]3 years ago
8 0

we know that

An equilateral triangle is a regular polygon, because all sides are equal

In a regular polygon the area is equal to

A=\frac{1}{2}*apothem*perimeter

in this problem we have

apothem=2.16\ cm\\ perimeter=22.45\ cm

substitute in the formula

A=\frac{1}{2}*2.16*22.45

A=24.2\ cm^{2}

therefore

<u>the answer is</u>

the area of the triangle is 24.2\ cm^{2}

gavmur [86]3 years ago
6 0
1/2(22.45 x 2.16)=24.
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3 years ago
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padilas [110]
(a). 
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It stands for ...

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FOIL works for multiplying ANY two binomials (quantities with 2 terms).

Here's another tool that you can use for this particular problem (a).
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in the other one.

Whenever you have     

              (the sum of two things) x (the difference of the same things)

the product is going to be

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______________________________

(b).
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You can do the product with FOIL, or use another little tool:

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(c).
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