Triangles

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