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Polygons
Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon
3 sides 4 sides 5 sides 6 sides 7 sides 8 sides
a
b c a + b + c = 180°
Triangles
Equilateral Isosceles Scalene Acute-angled Obtuse-angled Right-angled
triangle triangle triangle triangle triangle triangle
60° CHAPTER
CHAPTER
60° 60° 9 9
s
p p + q + r + s = 360°
q r
Quadrilaterals
Square Rectangle Parallelogram Rhombus Trapezium
219
219
Basic Polygons
Basic Polygons
09 TB Math F1.indd 219 11/10/16 12:18 PM
