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3 years ago

Hey can you please me asap!

Mathematics

2 answers:

crimeas [40]3 years ago

6 0

Answer:

It's D

Step-by-step explanation:

lord [1]3 years ago

3 0

Answer:

The correct answer option is b. Perimeter = 19.2 units, Area = 22 units $^2$ .

Step-by-step explanation:

We are given a pentagon ABDEC and we are to find its perimeter.

From the given figure, we can clearly see that the pentagon can be divided into two shapes, a square and a triangle. One side of each of these shapes will be excluded from the perimeter.

Distance of AB = $\sqrt{(4-1)^2+(6-4)^2} = \sqrt{13} =3.6$

The length of AB and AC are same and the BD, DE and CE are same (4 units).

Perimeter of pentagon ABDEC = 4 + 4 + 4 + 3.6 + 3.6 = 19.2 units

Area = (area of ΔABC) + (area of square BDEC)

= $(\frac{1}{2} *4*3)+(4*4)$

= 22 units $^2$

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Second, plug in the second pair and simplify as much as you can:

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substitution

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graphing (not my favorite, but it is doable)

Using substitution:

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