What is Acute Triangle?
Here are some examples of acute triangles.
Types of Acute Triangles:
There are broadly three types of acute triangles:
Equilateral Acute Triangle:  Isosceles Acute Triangle:  Scalene Acute Triangle: 
All the interior angles of an equilateral acute triangle measure 60°. It is also known as equiangular triangle. 
Two angles of an isosceles acute triangle that measure the same, just like its two sides. 
All three sides and internal angles of a scalene acute triangle are unequal, that is, all angles measure less than 90 degrees. 
Area of an acute triangle:
Area of a triangle = ^{1}⁄_{2} Base X Height
Here AD is the height, and BC is the base. So, the area can be calculated by simply putting in the values in the above formula.
Fun Facts about Acute Triangles:

Acute Triangles in Nature:
Acute triangles can be seen in a variety of forms. Here are some real life examples of acute triangles: