3. 3 Triangles Based on ANGLES
45˚
90˚ 45˚
RIGHT
Triangle
One angle
is 90˚ (right
angle)
4. 3 Triangles Based on ANGLES
45˚
80˚
90˚ 45˚
40˚ 60˚
RIGHT
Triangle
One angle
is 90˚ (right
angle)
5. 3 Triangles Based on ANGLES
45˚
80˚
90˚ 45˚
40˚ 60˚
RIGHT ACUTE
Triangle Triangle
One angle All three
is 90˚ (right angles are
acute
angle)
6. 3 Triangles Based on ANGLES
45˚
80˚ 50˚
90˚ 45˚ 100˚
40˚ 60˚
30˚
RIGHT ACUTE
Triangle Triangle
One angle All three
is 90˚ (right angles are
acute
angle)
7. 3 Triangles Based on ANGLES
45˚
80˚ 50˚
90˚ 45˚ 100˚
40˚ 60˚
30˚
RIGHT ACUTE
Triangle OBTUSE
Triangle
Triangle
One angle All three
One angle
is 90˚ (right angles are
is obtuse
acute
angle)
17. 3 Triangles Based on SIDES
5” 5”
5”
EQUILATERAL
TRIANGLE
ALL sides are
the same length
18. 3 Triangles Based on SIDES
5” 5” 6” 6”
5” 3”
EQUILATERAL
TRIANGLE
ALL sides are
the same length
19. 3 Triangles Based on SIDES
5” 5” 6” 6”
5” 3”
EQUILATERAL ISOSCELES
TRIANGLE TRIANGLE
ALL sides are TWO sides are
the same length the same length
20. 3 Triangles Based on SIDES
5” 5” 6” 6” 6” 4”
5” 3” 5”
EQUILATERAL ISOSCELES
TRIANGLE TRIANGLE
ALL sides are TWO sides are
the same length the same length
21. 3 Triangles Based on SIDES
5” 5” 6” 6” 6” 4”
5” 3” 5”
EQUILATERAL ISOSCELES SCALENE
TRIANGLE TRIANGLE TRIANGLE
ALL sides are TWO sides are NO sides are
the same length the same length the same length