Acute triangles- all three angles are acute (less than 90 degrees).
Right triangles- have one right angle and two acute angles.
Obtuse triangles- have one obtuse angle (greater than 90 degrees) and two acute angles.
Equilateral triangles- all three sides congruent sides.
Isosceles triangles- have at least two congruent sides.
Scalene triangles- all 3 sides different lengths.
Practice Problems
Classify the following triangles by their sides and angles.
\(\textbf{1)}\)
Right Scalene Triangle
\(\textbf{2)}\)
Equilateral (Acute) Triangle
Grace says “also an Isosceles Triangle.” Grace is correct.
Grace says “also an Isosceles Triangle.” Grace is correct.
\(\textbf{3)}\)
Acute Isosceles Triangle
\(\textbf{4)}\)
Obtuse Isosceles Triangle
\(\textbf{5)}\)
Right Isosceles Triangle
\(\textbf{6)}\)
Right Scalene Triangle
\(\textbf{7)}\)
Equilateral (Acute) Triangle
\(\textbf{8)}\)
Acute Scalene Triangle
\(\textbf{9)}\)
Obtuse Isosceles Triangle
\(\textbf{10)}\)
Equilateral (Acute) Triangle
\(\textbf{11)}\)
Right Isosceles Triangle
\(\textbf{12)}\)
Right Scalene Triangle
See Related Pages\(\)
\(\bullet\text{ Geometry Homepage}\)
\(\,\,\,\,\,\,\,\,\text{All the Best Topics…}\)
\(\bullet\text{ Area and Perimeter of Triangles}\)
\(\,\,\,\,\,\,\,\,\)
\(\,\, A=\frac{1}{2}bh, \,\, P=s_1+s_2+s_3…\)
\(\bullet\text{ Andymath Homepage}\)
