Plane Figures or Plane Shapes

# Plane Figures or Plane Shapes

## Plane Shapes or Plane Figures

Plane shapes are two-dimensional shapes. Their sides are made of straight or curved lines. They can have three or more sides. Plane shapes made of straight lines are called polygons.

Example: Figures drawn on paper that have only length and breadth are called plane shapes or 2-d shapes. Triangle, rectangles, squares, circle and oval are examples of plane shapes. Of which, triangle, rectangles and squares are called polygons. Polygons with 4 sides are called quadrilaterals. Quadrilaterals are also examples of plane shapes. Square, rectangle, parallelogram, rhombus, trapezium and kite are the main quadrilaterals and they are plane shapes. Let us know about these one by one.

Triangle:
The triangle is a shape that is formed by 3 line segments that are called sides.  It has 3 angles and 3 vertices.

Rectangle:
The rectangle is a shape that has 4 sides. The opposite sides of the rectangle are equal in length. The different property of a rectangle is that all 4 angles measure 90 degrees.

Square:
The square is a type of rectangle whose all 4 angles are right angles, and all 4 sides are equal in length.

Circle:
The circle is a shape that can be made by tracing a curve that is always the same distance from a point that we call the center. The distance around a circle is called the circumference of the circle.

Oval:
The oval is a shape that can be made by tracing a curve that is not exactly circular.

Parallelogram:
The parallelogram is a 4-sided polygon whose opposite sides are equal and parallel. Its diagonals are unequal and bisect each other.

Rhombus
The rhombus is a type of parallelogram whose all sides are equal. Its diagonals bisect each other at right angles.
Trapezium
The trapezium is a 4-sided polygon whose one pair of opposite sides are parallel.
If the non-parallel sides of a trapezium are equal, then the trapezium is called an isosceles trapezium.
Kite
The kite is a 4-sided polygon whose two pairs of adjacent sides are equal. Its longer diagonal bisects the shorter diagonal.
Properties of 2-D Shapes
1.      2-d shapes have only length and breadth.
2.      2-d shapes can be drawn on a sheet of paper.
3.      2-d shapes are flat shapes.