Plane Figure grade 6 recap lesson on geometry.pptx

Recap on basic shapes, plane figure, solid, lines, polygon, figures, point, line segment, ray, angle, triangle, quadrilateral, pentagon

1. Mathematics 6 REVIEW

2. Name the following figures: Circle

3. Name the following figures: Triangle

4. Name the following figures: Rectangle Quadrilateral / Parallelogram

5. Name the following figures: Square Quadrilateral / Parallelogram / Rectangle

6. Name the following figures: Trapezoid Quadrilateral

7. Name the following figures: Pentagon

8. Name the following figures: Decagon

9. Answer the following the question Write Yes / No / Sometimes in the answersheet ___________1. Is a square a rectangle? ___________2. Is a rectangle a square? ___________3. Is a circle a polygon? ___________4. Is a polygon a plane figure? ___________5. Is a rectangle a parallelogram? ___________6. Is a triangle a square? ___________7. Is an equilateral triangle a triangle? ___________8. Is a parallelogram a square? ___________9. Is a square a polygon? ___________10. Is a pentagon a quadrilateral?

10. Introduction to Geometry Geometry - that part of mathematics which deals with the properties of points, lines, surfaces and solids… Point (No Dimension) Line (One Dimension) Plane Figure (Two Dimension) Solids / Spatial Figure (Three Dimension) Length Length Width Length Width Depth

11. What is a point? A point in geometry is a location. It has no size, no width, no length and no depth. A point is shown by a dot.

12. What is a line? A line is defined as a line of points that extends infinitely in two directions. It has one dimension “length”

13. Line segment & Ray A ray is a part of a line that has one endpoint on infinitely in only one direction A line segment is a part of a line that has two endpoints

14. Line segment & Ray A ray is a part of a line that has one endpoint on infinitely in only one direction A line segment is a part of a line that has two endpoints

15. Intersecting Lines & Parallel Lines Parallel Lines never meet (never intersect) Perpendicular Lines are intersecting lines that meets at right angles. Intersecting Lines cross each other at a point.

16. Angle Angles are formed when two rays intersect at a point called the vertex

17. Angle Angles are formed when two rays intersect at a point called the vertex Ray 1 Ray 2 Vertex

18. Kinds of Angles Acute Angle Right Angle Obtuse Angle

19. Acute Angle An acute angle is an angle whose measure is greater than 0° and less than 90°.

20. Right Angle When an angle measures 90°, it is known as a right angle . A right angle can be easily observed as it forms the shape of the letter L.

21. Obtuse Angle When the measurement of an angle is less than 180° but greater than 90° it is an obtuse angle .

22. What is a Plane Figure? A plane figure is a geometric figure that has no depth. It lies entirely in one plane.

23. What is a Polygon? In geometry, a polygon can be defined as a flat or plane, two-dimensional closed shape with straight sides . It does not have curved sides.

24. Is the figure below a polygon? Answer the following with Yes / No No

25. Is the figure below a polygon? Answer the following with Yes / No Yes

26. Is the figure below a polygon? Answer the following with Yes / No Yes

27. Is the figure below a polygon? Answer the following with Yes / No No

28. Is the figure below a polygon? Answer the following with Yes / No No

29. Polygon Not a Polygon All sides are straight / made up of line segments Closed shape No curves

30. Names of Polygon according to the number of side

31. Triangle A polygon with 3 sides According to Side According to Angle Kinds of Triangle

32. Quadrilateral A polygon with 4 sides

33. Pentagon A polygon with 5 sides

34. Hexagon A polygon with 6 sides

35. Heptagon A polygon with 7 sides

36. Octagon A polygon with 8 sides

37. Nonagon A polygon with 9 sides

38. Decagon A polygon with 10 sides

39. Answer the following the question Write Yes / No / Sometimes in the answersheet ___________1. Is a square a rectangle? ___________2. Is a rectangle a square? ___________3. Is a circle a polygon? ___________4. Is a polygon a plane figure? ___________5. Is a rectangle a parallelogram? ___________6. Is a triangle a square? ___________7. Is an equilateral triangle a triangle? ___________8. Is a parallelogram a square? ___________9. Is a square a polygon? ___________10. Is a pentagon a quadrilateral? Yes Sometimes No Yes Yes No Yes Sometimes Yes No

40. Assessment Choose the correct answer inside the parenthesis. _________1. A (plane figure, line) has 2 dimensions . _________2. (Hexagon, Heptagon) is a polygon with 7 sides and 7 angles. _________3. A quadrilateral with 4 equal sides and 4 right angles is a (square, trapezoid) . _________4. A triangle has (3, 4) sides and angle. _________5. A circle is a (polygon, not a polygon) . Plane Figure Heptagon Square 3 Not a polygon