This document defines and describes different types of quadrilaterals. It states that a quadrilateral is a polygon with four sides and four angles. The document then defines various specific types of quadrilaterals, including parallelograms (with opposite sides parallel), rectangles (with four right angles and two pairs of equal sides), rhombus (parallelogram with four equal sides), squares (with four equal sides and four right angles), trapezoids (with one pair of parallel sides), isosceles trapezoids (with one pair of non-parallel sides equal), and kites (with two pairs of adjacent sides equal but no opposite sides equal). Diagrams are included to illustrate the key

1. by: Adrian M. Mataac
Bayuin NHS
(Socorro, Oriental Mindoro)

2. QUADRILATERALS
 Is a polygon consists of four segments joining at their
endpoints
 PROPERTIES:
 with four sides
 with four angles
 with four vertices
 With one pair of diagonals
 The measure of all the interior angles is 360 degees.

3. QUADRILATERALS
 Regular quadrilateral
Convex quadrilateral
Square
Concave quadrilateral

4. QuadrilateraI is denoted by its vertices, written consecutively in
clockwise or counterclockwise direction
S
consecutive
A
opposite
vertices S and A
angles
M
E
SAME
EMAS
A and E
LS and LA
LA and
LE
sides
SA and AM
SA and
EM

5. Quadrilaterals
Quadrilateral
(Trapezium)
Parallelogram
Trapezoid
Rectangle
Rhombus
Isosceles
Trapezoid
Square
Kite

6. Types of Quadrilaterals
 Parallelogram: Quadrilateral with opposite sides
that are parallel and of equal length and opposite
angles are equal
Indicates equal sides

7. Types of Quadrilaterals
 Rectangle: Quadrilateral with two pairs of equal
sides and four right angles (90 degrees)
Indicates equal sides
Box indicates 900 angle

8. Types of Quadrilaterals
 Rhombus: Parallelogram with four equal sides and
opposite angles equal
Indicates equal sides

9. Types of Quadrilaterals
 Square: Quadrilateral with four equal sides and four
right angles
(90 degrees)
Indicates equal sides
Box indicates 900 angle

10. Types of Quadrilaterals
 Trapezoid: A quadrilateral with exactly one pair of
parallel sides
Parallel sides never meet.

11. Trapezoid
 Isosceles Trapezoid: Trapezoid with nonparallel sides
congruent

12. Kite
 Kite: A quadrilateral with two pairs of adjacent sides
congruent and no opposite sides congruent