Types Of Triangle:
An ACUTE (all angles are acute) triangle contains three acute angles (each angle of an acute triangle is less than 90 degrees).sum of the angles of a triangle is always 180 degrees.An acute triangle may be isosceles,scalene or equilateral.
Obtuse triangles have one angle that is greater than 90° degrees.(Obtuse triangles have one obtuse angle).sum of the angles of a triangle is always 180 degrees.An obtuse triangle may be scalene or isosceles.
The right triangle has one 90 degree angle and two acute (< 90 degree) angles.sum of the angles of a triangle is always 180 degrees.A right triangle may be scalene or isosceles.
Equilateral Triangle is a Triangle in which all three sides are equal in lenght,equilateral triangle are also equiangular(angles are equal to each other, which is possible if all angles is equal to 60 degree).Now we can define equilateral triangle as "a triangle in which Angles and lenght of three side is equal", given picture/image of equilateral triangle below
Area of an equilateral triangle:
s is the length of one side of the triangle, and