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# What is a closed plane figure with three or more line segments?

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### Quick Answer

**A closed plane figure with three line segments is called a triangle.** If the closed plane figure has more than three line segments, it is called a polygon. The word “poly” means “many,” and there are different names for such figures.

A closed plane figure with four line segments is called a quadrilateral. This is the most common type of closed plane figure in geometry. A parallelogram, a rectangle, a square, a rhombus and a trapezium are all examples of quadrilaterals.

A closed plane figure with five sides is called a pentagon. A six and seven-sided figure is called a hexagon and a heptagon respectively. Similarly, a decagon has ten sides, and an octagon has eight sides.

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Q:
## What are the three sides of a triangle called?

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Full Answer >**Although, in general, triangles do not have special names for their sides, in right triangles, the sides are called the hypotenuse, the opposite side and the adjacent side.**The names change depending on which angle is the focus angle.Filed Under: -
Q:
## What is a plane in geometry?

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Full Answer >**In geometry, a plane is defined as a flat, infinite surface.**It has infinite length and width but no thickness. A plane is thus a two-dimensional, boundless surface and a subset of space.Filed Under: -
Q:
## How do you figure area?

A:The area of any simple shape, such as a circle, triangle or rectangle, can be found by taking a series of measurements from the shape and plugging them into a formula. The necessary formula varies according to the shape but works for all shapes of that type.

Full Answer >Filed Under: -
Q:
## What is square to plane as cube is to?

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Full Answer >**A square is to a plane as a cube is to a volume.**A square, a two-dimensional shape, exists on a plane, which is a two-dimensional space. Similarly, a cube is a three-dimensional object and exists in a volume, a three-dimensional space.Filed Under: