WORLD OF TRIANGLES

2. THE WORLD OF TRIANGLES

3. Triangles
A triangle is a 3
sided polygon.
Every triangle has
three sides and
three angles.
When added
together, the three
angles equal 180°
C
ab
A Bc

4. Acute Triangles
• An Acute triangle
in which all three
angles are less
than 90°

5. Obtuse Triangles
• An obtuse triangle is a
triangle in which one
of the angles is
greater than 90°

6. Right Triangles
• A right triangle is
a triangle with an
angle of 90°

7. Scalene Triangles
• A scalene triangle
is a triangle with
three unequal
sides.

8. Isosceles Triangles
• An isosceles
triangle is a
triangle with two
equal sides.
h
b b
a

9. Equilateral Triangles
• An equilateral
triangle with all
three sides of
equal length.
aa
60° 60°
60°
a

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