Pentagons have five sides, so 5x = 20. Only value for x that makes this true is 4, so 4 cm per side.
Answer:
pleasss mark me as brainliest answer the answer is on the pic just tap it
<u><em>Answer: </em></u>12.75
<em><u>Explanation-</u></em>
Add them all together and divide by how many numbers there are. Hope this helped!!!
There is a really easy way to find this out I can't really help you so if you just look it up on google you should get your awnser