Polygons and their formulas
Presentation
•
Mathematics
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5th - 7th Grade
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Hard
Venethra Ranganathan
FREE Resource
3 Slides • 2 Questions
1
Polygons and their formulas
Class 5-7
2
Polygons are closed figures or curves.They are simple ie.the sides do not overlap.They must be made up of line segments
Circle is the polygon with infinite slides
Triangle has the last number of sides - 3
3
Some important formulas
Exterior angle measure sum(EMS) is always 360 degrees
Interior angle measure sum (AMS) depends on the sides of the polygon
AMS property - 180(n-2)
No. of diagonals - n(n-3)/2
n refers to the number of sides
In a circle the AMS is 360 degrees as the angle measure around a point is always 360
4
Multiple Choice
The number of sides of a polygon with interior angles measuring to a sum of 540 degrees must be
Triangle
Decagon
Pentagon
5
Multiple Select
Can an interior angle of a figure be 22 degrees?
No because of EMS
Yes because the sides need not be a whole number
Polygons and their formulas
Class 5-7
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