SHAPES , SPACE AND PATTERNS

Created by ABHA ARORA

A CUBOID HAS 8 CORNERS,

12 EDGES

6 FACES

LINES

LINES CAN BE :

STRAIGHT OR CURVED

3 TYPES OF STRAIGHT LINES ARE:

VERTICAL HORIZONTAL SLANTING

VERTICAL

HORIZONTAL

SLANTING

LINES CAN ALSO BE CURVED

A PICTURE IS MADE USING BOTH TYPES OF LINES

CLOSED SHAPE

A CLOSED SHAPE THAT DOES NOT CROSS ITSELF IS A SIMPLE CLOSED CURVE.

EXAMPLE

MORE EXAMPLES

SOME CLOSED SHAPES ARE FORMED ONLY WITH STRAIGHT LINES.

THESE ARE CALLED POLYGONS

EXAMPLES

EXERCISE

Put a tick mark on the simple closed curves

Polygon or not

TYPES OF POLYGONS

A POLYGON IS NAMED ACCORDING TO THE NUMBER OF SIDES IT HAS.

EXAMPLE

A POLYGON WITH 3 LINE SEGMENTS IS CALLED A TRIANGLE.

A POLYGON WITH 4 LINE SEGMENTS IS CALLED A QUADRILATERAL.

A RECTANGLE IS A SPECIAL QUADRILATERAL IN WHICH OPPOSITESIDES ARE OF EQUAL LENGTH

A SQUARE IS A SPECIAL RECTANGLE IN WHICH ALL 4 SIDES ARE EQUAL.

SAY WHETHER TRUE OR FALSE:

A) all squares are quadrilateral. B) a triangle is a polygon. C) a polygon is made up of line segments. D) all quadrilaterals are rectangles.

THE END