A cuboid has 8 corners, 12 edges, and 6 faces. Lines can be straight or curved, with straight lines being vertical, horizontal, or slanting. Closed shapes that do not cross themselves are simple closed curves, while polygons are closed shapes formed only with straight lines. Polygons are named according to the number of sides, with a 3-sided shape called a triangle and a 4-sided shape called a quadrilateral, such as rectangles that have opposite sides of equal length and squares that have 4 equal sides.

1. SHAPES , SPACE AND PATTERNS Created by ABHA ARORA

2. Shapes

3. A CUBOID HAS 8 CORNERS, 12 EDGES 6 FACES

4. LINES LINES CAN BE : STRAIGHT OR CURVED

5. 3 TYPES OF STRAIGHT LINES ARE: VERTICAL HORIZONTAL SLANTING

6. VERTICAL

7. HORIZONTAL

8. SLANTING

9. LINES CAN ALSO BE CURVED

10. A PICTURE IS MADE USING BOTH TYPES OF LINES

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

12. EXAMPLE

13. MORE EXAMPLES

14. SOME CLOSED SHAPES ARE FORMED ONLY WITH STRAIGHT LINES. THESE ARE CALLED POLYGONS

15. EXAMPLES

19. EXERCISE Put a tick mark on the simple closed curves

22. Polygon or not

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

27. EXAMPLE A POLYGON WITH 3 LINE SEGMENTS IS CALLED A TRIANGLE.

28. A POLYGON WITH 4 LINE SEGMENTS IS CALLED A QUADRILATERAL.

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

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

31. 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.

32. THE END