1. Triangles
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2. Triangles: 3 sided polygons
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3. Can be classified in two ways:
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4. Can be classified in two ways:
by angles
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5. Can be classified in two ways:
by angles
by sides
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6. by angles
acute
obtuse
right
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7. by sides scalene isosceles equilateral (No equal sides)
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8. So triangles have 2 classifications:
Example 1
Right , scalene triangle
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9. acute , isosceles triangle
Example 2
acute , isosceles triangle
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10. right, isosceles triangle
Try
Example 3
right, isosceles triangle
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11. obtuse, scalene triangle
Try
Example 4
obtuse, scalene triangle
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12. Draw a triangle and see if the person next to you can classify it by angles and sides.
Created by G. Antidormi 2005