Table of contents | |
Polygon | |
Concave polygons | |
Convex polygons | |
Regular and irregular polygons | |
Parallelogram | |
Rhombus | |
Rectangle | |
Square | |
Kite | |
Trapezium | |
Diagonal |
A simple closed curve made up of only line segments is called a polygon.
A polygon is a two-dimensional shape that has a minimum of three sides and angles. A convex polygon is a shape in which all of its vertices point in the outward direction.
A regular polygon is a two-dimensional shape having all sides of equal length and all interior angles of equal measure.
An irregular polygon, also known as non-regular polygon is a shape that does not have all sides of equal length and all angles of equal.
A quadrilateral with each pair of opposite sides parallel.
A parallelogram with sides of equal length.
A parallelogram with a right angle.
A quadrilateral with exactly two pairs of equal consecutive sides.
A quadrilateral having exactly one pair of parallel sides.
Convex: The measure of each angle is less than 180º .
Concave: The measure of at least one angle is more than 180º.
Quadrilateral: A polygon having four sides.
Element of quadrilateral:
(i) Sides: Line segments joining the points.
(ii) Vertices: Point of intersection of two consecutive sides.
(iii) Opposite sides: Two sides of a quadrilateral having no common endpoint.
(iv) Opposite Angles: Two angles of a quadrilateral not having a common arm.
(v) Diagonals: A line segment is obtained by joining the opposite vertices.
(vi) Adjacent Angles: Two angles of a quadrilateral having a common arm.
(vii) Adjacent Sides: Two sides of a quadrilateral having a common endpoint.
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1. What are the different types of quadrilaterals? |
2. How do you identify a quadrilateral? |
3. What is the sum of the interior angles of a quadrilateral? |
4. How do you classify a quadrilateral based on its sides and angles? |
5. Can a quadrilateral have all right angles? |
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