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A closed polygon has 14 diagonals. how many numbers of sides does it have?
It will have 7 sides
A polygon has 20 diagonals how many sides does it have?
It is an octagon with 8 sides. Let n be the number of sides = number of vertices. Then each vertex can be connected to n-3 other vertices, giving n(n -3) connections. However, this counts each vertex pair connection twice, so there are: n(n - 3) / 2 diagonals. Thus if there are 20 diagonals: n(n - 3) / 2 = 20 n2 - 3n = 40 n2 - 3n - 40 = 0 (n + 5)(n - 8) = 0 so n = -5 or 8. As a polygon cannot have a negative number of sides, n = 8.
How many diagonals does a shape with 5 sides have?
5(5-3)/2. That it is the formula so that shape would have 5 diagonals. n(n-3)/2 where n is the number of sides
How many diagonals are in a 9 sided polygon?
The formula is: 0.5*(n2-3n) where n is the number of sides of the polygon. So: 0.5*(81-27) = 27 diagonals
Aiden received 16 cards at a party Each person exchanged exactly 1 card with each of the other people How many people were present at the party?
17
How many sides on each face does a dodecahedron have?
Five sides.
How many sides does a dodecahedron have?
A dodecahedron has 12 sides.
How many sides does a 3-d dodecahedron have?
a 3-d dodecahedron has 12 pentagon shaped sides
How many sides has a dodehedron?
A dodecahedron has 12 sides.
A dodecahedron has how many sides?
Twelve.
How many lines of symmetry does a dodecahedron have?
A dodecahedron has 30 lines of symmetry. This is because each face of a dodecahedron is a regular pentagon, which has 5 lines of symmetry. Therefore, each face contributes 5 lines of symmetry, and since a dodecahedron has 12 faces, the total number of lines of symmetry is 5 x 12 = 30.
How many sides on a dodecahedron?
When you say "sides", do you mean faces or edges? A dodecahedron has 12 faces and 30 edges.
How many diagonal sides does a dodecahedron have?
it has 54 diaganal sides
How many face does an dodecahedron?
12 faces.
How many sides does a 3D pentagonal have?
12 (a dodecahedron)
How many corners dose a dodecahedron have?
12 sides.
How many sides does a tetrahedron have on each face?
Each face has three edges.
