A triangle is a three sided polygon, What are the different types of triangles?
A triangle with three congruent (equal) sides and three equal angles.
All the sides length (shown by the line through each of them) and all the angles a the same length:
A triangle with at least two congruent (equal) sides.
Two sides are equal (shown by the lines). Angles opposite the equal sides are equal:
Has only one right angle (90 degrees).
This is shown by the square block at angle B. The side opposite the right angle in called the hypotenuse:
A triangle that has no congruent (equal) sides.
No sides are equal, no angles are equal
All the angles are less than 90º.
One of the angles is greater than 90º. The longest side is opposite the larget angle.