5 sided 2-dimensional object
The perimeter is a characteristic of a 2-dimensional object. A 12 by 13 by 5 sounds like a 3-dimensional object which would not have a perimeter.
A five-sided 2-dimensional shape is a pentagon.
0. A triangle is a 2-dimensional object and so its volume - which requires a 3-dimensional object - is always zero.
Pentagon
A 5-sided 2-dimensional figure is a pentagon and a 5-sided 3-dimensional shape is a pentahedron.
5 sided 2-dimensional object
A pyramid
The perimeter is a characteristic of a 2-dimensional object. A 12 by 13 by 5 sounds like a 3-dimensional object which would not have a perimeter.
A five-sided 2-dimensional shape is a pentagon.
None normally because a pentagon is 2 dimensional 5 sided shape whereas a sphere is a 3 dimensional globular shape.
0. A triangle is a 2-dimensional object and so its volume - which requires a 3-dimensional object - is always zero.
Pentagon
A 5 sided shape with 5 angles is a pentagon
A rectangle is a 2-dimensional object and cannot have a volume, which is a 3-dimensional concept. The volume of the rectangular prism or cuboid, whose dimensions are 4 by 5 by 3 is 4*5*3 = 60 cubic units.
A pentagon literally means "5-sided object." Why is this a legal question?
A 2-dimensional plain polygon is called a 'DECAGON'. Here are the names for 2-dimensional polygons, up to ten sides. 3 Trigon ( triangle) 4 Tetragon ( Quadrilateral) 5 Pentagon 6 Hexagon 7 Heptagon 8 Octagon 9 Nonagon 10 Decagon. NB The suffix '--gon' indicates a 2-dimensional figure. The prefixes ' tri--- (etc))' are from their Latin roots. NNB The suffix '---hedron- indicates a 3-dimensional object. . e.g. 'Tetrahedron'. a four sides 3-dimensional object. (commonly referred to as a 'triangular based pyramid).