5*5 = 25 sides.
Three pentagons have a total of 15 sides. Each pentagon has 5 sides, so when you have 3 pentagons, you would multiply 5 sides by 3 pentagons to get 15 sides in total.
37 sides
A dodecagon has 12 sides, and a pentagon has 5 sides. So 5 dodecagons have 5*12 = 60 sides, and 4 pentagons have 4 * 5 = 20 sides, for a total of 60 + 20 = 80 sides.
heptagons have 7 sides pentagons have 5 sides therefore 4 x 7 = 28 4 x 5 = 20 Total 48 sides.
There are 11 times 5 = 55 sides in 11 pentagons.
1 pentagon = 5 sides. 55 pentagons = 5*55 = 275 sides.
Pentagons
Pentagons
Pentagons have 5 sides if that's any help..
A pentagon has 5 sides. If you have 4 pentagons, you use: 4x5=20. Therefore, 4 seperate pentagons have 20 sides. This is not true if you have them combined however.
A pentagon has five sides, and a decagon has ten sides. So 3 pentagons and 5 decagons have (35)+(510) = 65 sides altogether
Pentagons do not have four sides, they all have 5 sides