Quadrilateral, Square, Rectangle, Rhombus, Parallelogram

__Draw
2D shapes in free hand with geometry tools.__

__Quadrilateral__

1. All closed four sided figures are
called quadrilaterals

2. It has four sides (AB,BC,CD,DA),
four vertices (A,B,C,D) and two diagonals (AC,BD)

**EXAMPLES**

Square, Rhombus, Rectangle, Trapezium,
Parallelogram

__Square__

A square has four equal sides
(PQ=QR=RS=SP), four vertices (P, Q, R, S) and two diagonals (PR, QS).

The diagonals of a square are
equal in length (PR = QS).

**Examples**

Carom board, Chess board, One face
of the dice

__Rectangle__

A rectangle has four sides (WX,
XY, YZ, ZW) and four vertices (W, X, Y, Z). It has two equal diagonals (WY =
ZX) and opposite sides are equal (WX = YZ ; XY = WZ).

**Examples**

Mat, Black Board

__Rhombus__

A rhombus has four equal sides
(LM = MN = NO = OL), four vertices (L, M, N, O) and two diagonals (LN, MO).

The diagonals are not equal in
length.

**Examples**

__Parallelogram__

A Parallelogram has four sides (EF,
FG, GH, HE) and four vertices (E, F, G, H). Opposite sides are parallel and
equal in length (EF=GH; FG=HE)

**Activity**

Use Geoboard and rubber band to
form or deform or reform the different shapes. Discuss similarities and
differences among the shapes.

Tags : Geometry | Term 1 Chapter 1 | 4th Maths , 4th Maths : Term 1 Unit 1 : Geometry

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail

4th Maths : Term 1 Unit 1 : Geometry : Draw 2D shapes in free hand with geometry tools | Geometry | Term 1 Chapter 1 | 4th Maths

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