Acute Triangle. The Scalene Triangle has no congruent sides. One of the sides of this square coincides with a part of the longest side of the triangle. The Obtuse Triangle has an obtuse angle (an obtuse angle has more than 90°).
The area of any triangle is 1/2 the base multiplied by its height.
An obtuse triangle has only one inscribed square. In other words, each side must have a different length.. An obtuse triangle may be either isosceles (two equal sides and two equal angles) or scalene (no equal sides or angles). The Acute Triangle has three acute angles (an acute angle measures less than 90°) Obtuse Triangle.