How many lines of symmetry does a regular decagon have

a.0
b.5
c.10
d.20

Step-by-step explanation:

A regular polygon has as many lines of symmetry as there are angles (sides).

We have decagon → 10 angles (sides). Therefore the number of lines of symmetry is 10.

how many lines of symmetry does a regular decagon have  

A.0

B.5

C.10

D.20

Step-by-step explanation:

A decagon has 10 sides and is a polygon

12cm

the answer is d

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.