Polygons.pptx GRADE 5 MATHEMATICS - 3RD QUARTER

Mathematics Power point for Grade 5 Learners.

1. Polygons Q3-WEEK 3

2. Basic Geometric Terms . Point Line Line segment Ray Angle Plane -is an exact location in space or a flat surface -is a set of all points that extends infinitely in both directions -is a part of the line with two end points -starts from one point and extend infinitely in one direction -is formed when two rays meet at a common endpoint -is a flat two-dimensional surface that extends infinitely far

3. Visualizing, Naming, Describing, and Drawing Polygons with Five or More Sides LESSON 1

4. Polygon A polygon is a closed 2-dimensional figure made up of three or more straight line segments . Each line segment on a polygon is a side . Each corner, or vertex , of a polygon forms an angle . 3 sides . . . 3 vertices 3 angles TRIANGLE

5. Cross -out which of the following is not a polygon.

6. Polygons are named by the number of sides they have. Figure Sides, Vertices, Angles Name 3 Triangle 4 Quadrilateral 5 Pentagon 6 Hexagon 7 Heptagon

7. Polygons are named by the number of sides they have. Figure Sides, Vertices, Angles Name 8 Octagon 9 Nonagon 10 Decagon 11 Undecagon/ Hendecagon 12 Dodecagon

8. Describe how many sides and name of the polygon is being shown. No. of Sides:_____ Name of the Polygon:_________ No. of Sides:_____ Name of the Polygon:_________ No. of Sides:_____ Name of the Polygon:_________ No. of Sides:_____ Name of the Polygon:_________ No. of Sides:_____ Name of the Polygon:_________

9. Complete the chart by counting the parts for each regular polygon.

10. Describing and Comparing Properties of Polygons (Regular and Irregular) LESSON 2

11. A regular polygon has same length in sides and same measurement in angles . Regular Pentagon Irregular Pentagon

12. Regular Polygons Irregular Polygons

13. Visualizing Congruent Polygons LESSON 3

14. Two polygons are congruent if their corresponding sides have equal lengths , and their corresponding angles measure the same .

15. How to Draw a Regular Polygon Using a Protractor Materials: 1. Protractor 2. Ruler 3. Pencil

16. How to Draw a Regular Polygon Using a Protractor 1. Draw a straight line using the protractor.  This will be the center line of your circle (dividing it into semi-circles). Procedures: 2. Align the protractor so that both 0° and 180° lie on the center line.   Mark the center point. 3 . Calculate the angle between adjacent vertices, by dividing 360 by the number of sides.   4 . Mark a point for each of the successive angles.   5 . Using the ruler, joint the points marked on the circle with a line segment 6 . Check to see that the sides are the same length. If they are, you can erase the other marks made to make it now a polygon. .

17. Draw the congruent polygon of the figure at the left using the grid at the right.

18. MATHtry Nga!

19. 1. Which among the figures below is an example of a polygon? L and O O and V L and E V and E L O V E

20. 2. What polygon is being shown in the figure? Hexagon Heptagon Nonagon Octagon

21. 3. Look at the figure. If I am inside of a hexagon but I am not a pentagon, who am I? Hexagon Decagon Heptagon Dodecagon

22. 4. Which of the following figure is not a regular polygon?

23. 5. Which pair shows congruent polygons?

24. ASYNCHRONOUS ACTIVITY What I Can Do and Assessment on pages 8-9 (SLM)