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POLYGONS

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Published in: Mathematics | Maths
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POLYGONS PPT CLASS 8

Adila K / Sharjah

2 years of teaching experience

Qualification: B ED IN MATHEMATICS

Teaches: Science, Maths, Statistics, Mathematics

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  1. POLYGONS
  2. TRIANGLE 3 VERTICES 3 SIDES
  3. QUADILATERAL 4 VERTICES 4 SIDES
  4. PENTAGON 5 VERICES 5 SIDES
  5. HEXAGON 6 VERTICES 6 SIDES
  6. HEPTAGON 7 VERICES 7 SIDES
  7. OCTAGON 8 VERTICES 8 SIDES
  8. SUM OF ANGLES
  9. Q. All the angles of a 20 sides polygon are same. How much is each?
  10. Sum of angles of a polygon is (n - 1800 n = 20
  11. SUM OF ANGLES = (20 - 2) X 1800 = 18 x 1800 SUM OF ANGLES = 32400
  12. total angle Each angle = total sides 3240 20 Each angle = 162
  13. OUTER ANGLES
  14. B c TRIANGLE 3 SIDED POLYGON HAVING 3 ANGLES AND 3 VERTICES TOTAL SUM OF ANGLES IS 1800
  15. EXTENDED 2 VERTICES THEN THERE TWO ANGLES OUTSIDE THE TRIANGLE THE ANGLES FORMED OUTSIDE THE POLYGON IS CALLED OUTER ANGLES AND ANGLES INSIDE IS CALLED INTERIOR ANGLES
  16. N/A
  17. c HOW TO FIND <ACD (OUTER ANGLE) LINEAR PAIR ALWAYS FORM 1800 OR ON A STRAIGHT LINE ANGLE FORMED IS 1800 < ACB AND <ACD ARE LINEAR PAIRS SO <ACB + <ACD = 1800 <ACD = 1800— <ACB
  18. LINEAR PAIRS ARE <ACB + <ACD = 180 <CAB + <BAF = 180 <CBA + <CBE = 1800 c
  19. c LINEAR PAIRS ARE <ABC + <CBE = 180 <BCD + <DCF = 1800 <CDA + <ADG -1800 <DAB + <BAH -1800
  20. Compute all the outer and inner angles of the figures below 700 1450 1000 750 1150
  21. N/A

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