3 years ago

How many lines of symmetry are in the regular pentagon O A. 3O B. 5O C. 7O D. 9

Mathematics

1 answer:

stiks02 [169]3 years ago

7 0

Answer:

Step-by-step explanation:

There is one line of symmetry for each side of the pentagon.

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Find the midpoint of the line segment with the endpoints (1, 0) and (2, -10).

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$\bigl(\frac{3}{2},-5\bigr)$

or in decimal form

$(1.5,-5)$

Step-by-step explanation:

The midpoint of the line with endpoints $(x_1,y_1)$ and $(x_2,y_2)$ is $\bigl(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\bigr)$ . just take the average between the points

so given the points (1,0) and (2,-10)

$x_1=1$

$y_1=0$

$x_2=2$

$y_2=-10$

the midpoint is found as follows:

$\bigl(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\bigr)$

$\bigl(\frac{1+2}{2},\frac{0-10}{2}\bigr)$

$\bigl(\frac{3}{2},\frac{-10}{2}\bigr)$

$\bigl(\frac{3}{2},-5\bigr)$

or in decimal form

$(1.5,-5)$

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3 years ago

How many lines of symmetry are in the regular pentagon O A. 3O B. 5O C. 7O D. 9​

How many lines of symmetry are in the regular pentagon O A. 3O B. 5O C. 7O D. 9