GRADE 5 MATHEMATICS

Last Week’s Answers 1. a) 5,10,15,20,25,30,35,40,45,50. b) 6,12,18,24,30,36,42,48,54,60. c) 9,18,27,36,45,54,63,72,81,90. d) 12,24,36,48,56,72,84,96,108,120 e) 15,30,45,60,75,90,105,120,135,150. (a) 18 (b) 45 (c) 60 (d) 56 30 days 4. 60 minutes/1 hour

Insert the words: side, vertex, diagonal, interior angle, exterior angle, vertices. Use each word only once. 9. One of the line segments that make up the polygon ………… .. 10. A point where two sides meet……….. 11. Two or more of these points are called ………. 12. A line connecting two vertices that isn’t a side ………… 13. Angle formed by two adjacent sides inside the polygon ………… . 14. Angle formed by two adjacent sides outside the polygon …………

Polygons are named after the number of sides. The prefix in a polygon’s name tells the number of sides it has. Tri – 3, quad – 4, penta – 5 hexa – 6 hepta – 7 .

Sides n 3 4 5 6 7 8 10 12

Name N-gon Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon Decagon Dodecagon

Exercise 2 Write a name for each of these polygons. List the number of sides and angles for each. Goodbye boys and girls. Until next week.