A shape with 5 sides is a pentagon
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Pentagon.
A pentagon has 5 sides whose midpoints form a star shape.
A pentagon has 5 sides; a pentagon is any five-sided polygon. A pentagon has 5 edges. A vertex (plural: vertices) is a point where two or more straight lines meet and a pentagon has 5 vertices.Some objects shaped like a pentagon are Baseball home plates, fire hydrant bolts, and some street signs.
a 3-d dodecahedron has 12 pentagon shaped sides
A decagon has 10 sides, and a hexagon has 6 sides. To figure out the total number of sides for 5 decagons and 5 hexagons:Number of Sides = 5(10) + 5(6)Number of Sides = 50 + 30Number of Sides = 80