Mat_6th_ud3_the plane figures and their areas Mat_6th_ud3_the plane figures and their areas Mat_6th_ud3_the plane figures and their areas Mat_6th_ud3_the plane figures and their areas Mat_6th_ud3_the plane figures and their areas Mat_6th_ud3_the plane figures and their areas Mat_6th_ud3_the plane figures and their areas

1. 6th
grade - Unit 3
The plane figures
and
their areas
by Maria Adrover

2. DEFINITION
● Plane figures are flat two-dimensional (2D) shape.
● A plane figure can be made of straight lines, curved lines, or
both straight and curved lines. The lines should be closed.

3. POLYGON: Definition and parts of it
● A polygon is a closed polygonal line (straight) and its inside.

4. REGULAR AND IRREGULAR POLYGONS
● The regular polygons
– have sides that are all the same lenght.
– Have angles that are all the same size.

5. THE MOST COMMON POLYGONS
● Polygons are classified depending to the number of sides.

6. TYPES OF QUADRILATERALS

7. AREA: SQUARE AND RECTANGLE

8. AREA: RHOMBOID AND TRIANGLE

9. AREA: RHOMBUS

10. AREA: RHOMBUS

11. AREA: TRAPEZOID

12. AREA: REGULAR POLYGON

13. CIRCLE AND CIRCUMFERENCE

14. RELATION BETWEEN A LINE AND A CIRCUMFERENCE

15. CIRCUMFERENCE'S LENGHT

16. CIRCLE'S AREA