15 sides
37 sides
Pentagons have 5 sides if that's any help..
10c5
Dodecahedron
A regular pentagon has 5 equal sides. An irregularpentagon has 5 sides that are not all equal.
A pentagon has five sides, and a decagon has ten sides. So 3 pentagons and 5 decagons have (35)+(510) = 65 sides altogether
37 sides
A quadrilateral has four sides and a pentagon has five. So 2 quadrilaterals and 3 pentagons have 2x4 +3x5 sides = 8 + 15 = 23 sides altogether.
They have 49 sides.
75
There are 11 times 5 = 55 sides in 11 pentagons.
1 pentagon = 5 sides. 55 pentagons = 5*55 = 275 sides.
A pentagon has five sides, and a quadrilateral has four sides. So five pentagons and three quadrilaterals have 5*5 + 3*4 sides = 25 + 12 sides = 37 sides.
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.
There are: (5*6)+(3*5)+(5*3) = 60 sides
500
20 :)