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Q: How many sides do 3 octagons have?

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24 sides

There are 64 sides in eight octagons.

A hexagon has six sides, and an octagon has eight. 3 hexagons and 3 octagons have 3*6 + 3*8 sides = 18 + 24 sides = 42 sides altogether.

94

8

A decagon has ten sides and an octagon has eight, so in 3 decagons and 5 octagons there are (3*10)+(5*8) = 30 + 40 = 70 sides altogether.

8 Corners and sides.

A decagon has ten sides, a heptagon seven, and an octagon eight. So in 4 decagons, 4 heptagons, and 3 octagons there are 4*10 + 4*7 + 3*8 = 40 + 28 + 24 = 92 sides altogether.

64.

An octagon has 8 sides. A decagon has 10. So 3*8+10 = 34 sides

All octagons have 8 sides and 8 angles

There are: (5*12)+(3*8) = 84 sides

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