"An acute triangle is a type of triangle whose all three interior angles are less than 90 degrees i.e. acute. An equilateral triangle is also an acute triangle which has three equal sides, and all angles less than 90 degrees. In an acute triangle, the orthocenter lies inside the triangle.Calculating the area of an acute triangle:-The area of an acute triangle is calculated using the formula:Area
. = 1/2 bhwhere b = the length of the base of the triangle,and h = the height of altitude of the triangle.The area of the acute triangle is also derived from the lengths of the sides, using Heron's formula:1. Area = Square root of [s(s-a) (s-b) (s-c)]where s = (a + b + c) / 22. Area = 1/4 [Square root of {(a2 + b2 + c2)2 - 2(a4 + b4 + c4)}]3. Area = 1\4 [Square root of {2(a2b2 + a2c2 + b2c2) - (a4 + b4 + c4)}]4. Area = 14 [Square root of {(a + b - c)(a - b + c) (-a + b + c) (a + b + c)}]"
