Parallelogram 49281

The circumference of the parallelogram measures 2.8 m. The length of one of its sides is equal to one-seventh of the entire circumference. Calculate the sizes of the sides of this parallelogram.

Correct answer:

a =  0.4 m
b =  1 m

Step-by-step explanation:

$$\begin{gathered} o=2.8\text{m} \\ a=\frac{1}{7}\cdot o=\frac{1}{7}\cdot 2.8=\frac{2}{5}\text{m}=0.4\text{m} \end{gathered}$$

$$\begin{gathered} o=2\cdot a+2\cdot b \\ b=(o-2\cdot a)/2=(2.8-2\cdot 0.4)/2=1\text{m} \end{gathered}$$

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