Grade 4 Math Geometry: Drawing 2D Shapes, Quadrilaterals, Square, Rectangle, Rhombus

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

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)
Quadrilateral Diagram
EXAMPLES
Square, Rhombus, Rectangle, Trapezium, Parallelogram
Quadrilateral Examples

Square

A square has four equal sides (PQ=QR=RS=SP), four vertices (P, Q, R, S) and two diagonals (PR, QS).
Square Diagram
The diagonals of a square are equal in length (PR = QS).
Examples
Carom board, Chess board, One face of the dice
Square Examples

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).
Rectangle Diagram
Examples
Mat, Black Board
Rectangle Examples

Rhombus

A rhombus has four equal sides (LM = MN = NO = OL), four vertices (L, M, N, O) and two diagonals (LN, MO).
Rhombus Diagram
The diagonals are not equal in length.
Examples
Rhombus Example

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)
Parallelogram Diagram

Activity

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