Types of Triangles
Triangles are classifies into three categories according to its sides and they are also classifies into three categories according to its angles.
Types of Triangles According to its Sides
1. Equilateral Triangle
An equilateral triangle consists of three equal sides
and equal angles. Every side of the triangle is of the same length and every
angle will be of the same measure of 60°. The following figure shows an
equilateral triangle:
2. Isosceles Triangle
The triangle with only two equal sides is known as the
isosceles triangle. Not only two equal sides, the isosceles triangle also
consists of two equal angles. The following figure shows an isosceles triangle:
3. Scalene Triangle
The triangle with no equal sides is called a scalene
triangle. Each side of this triangle is of different length. The following
figure shows a scalene triangle:
Types of Triangles According to its Angles
1. Right-angled Triangle
A right-angled
triangle consists of one right angle and two acute angles. The right angle is
an angle which measures 90 degrees and the acute angles are those angles which
measure less than 90 degrees. The following figure shows the right-angled triangle:
2. Obtuse-angled
Triangle
An obtuse-angled triangle is a combination of two acute
angles and one obtuse angle. The acute angle is those angles which measure less
than 90° whereas the obtuse angle is those angle which measures above 90°. The following
figure shows the obtuse-angled triangle:
3. Acute-angled Triangle
An acute-angled triangle is a triangle which consists of
three angles all of below 90° that is acute angles. The following figure shows
the acute-angled triangle:
