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Greeley [361]
3 years ago
5

Can someone help me and show how to write the perimeter equation to this polygon.

Mathematics
2 answers:
faltersainse [42]3 years ago
4 0

10x + 8 = 21

x = 1.3

Step-by-step explanation:

a)

In pentagon ABCDE,

AB = DE = 2x + 3 and BC = CD = x + 1

Perimeter of pentagon ABCDE = 21

4x + 2(2x + 3) + 2(x + 1) = 21

4x + 4x + 6 + 2x + 2 = 21

\purple {\boxed {\bold{10x + 8 = 21}}}

b)

10x = 21 - 8

10x = 13

x =  \frac{13}{10}  \\ x = 1.3 \: cm

Lana71 [14]3 years ago
4 0

STEP BY STEP EXPLANATION BOIZ:

A) AB + BC × 2 + AE = 21

B)  The value of x is 1.3

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