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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.

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1mo ago
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Wiki User

13y ago

15

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Anonymous

Lvl 1
4y ago

15 sides

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Q: How many sides does 3 pentagons have?
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Related questions

How many sides do 2 quadrilaterals and 3 pentagons have altogether?

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.


How many sides do 3 pentagons 5 heptagons and 4 hexagons have in all?

74 sides


How many sides do eleven pentagons have?

There are 11 times 5 = 55 sides in 11 pentagons.


How many sides do five pentagons and three quadrilaterals have altogether?

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.


How many sides does 100 pentagons have?

500


How many sides do 4 decagons 5 dodecagons and 3 pentagons have altogether?

A decagon has 10 sides, a dodecagon 12, and a pentagon 5. So 4 decagons, 5 dodecagons, and 3 pentagons have 4*10 + 5*12 + 3*5 sides = 40 + 60 + 15 = 115 sides altogether.


What shapes are pentagons?

The Pentagon


How many side does a convex pentagon have?

Pentagons (including convex pentagons) have five sides. (The prefix penta- is greek for 5)


How many sides do 4 heptagons and 4 pentagons have altogether?

heptagons have 7 sides pentagons have 5 sides therefore 4 x 7 = 28 4 x 5 = 20 Total 48 sides.


How many sides do 3 hexagons and 3 nonagons have altogether?

A hexagon has six sides, and a nonagon has nine. Three hexagons and three nonagons then have (3 x 6) + (3 x 9) = 18 + 27 = 45 sides altogether.


What is the surface of a hexahedron?

They are plane faces which can have from 3 to 5 sides (triangles, quadrilaterals and pentagons)..


What do pentagons look like?

Pentagons have 5 sides if that's any help..