Classifying Triangles

An isosceles triangle is a triangle that has at least two sides of equal length.

An acute triangle is a triangle where all three interior angles are less than 90 degrees.

An obtuse triangle is a triangle that has one interior angle greater than 90 degrees.

A right triangle is a triangle that has one interior angle equal to 90 degrees.

An isosceles right triangle is a triangle that has two sides of equal length and one right angle.

An equilateral triangle is a triangle where all three sides are of equal length and all three interior angles are equal to 60 degrees.

The sum of the interior angles of a triangle is always 180 degrees.

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.

A scalene triangle has all sides of different lengths, while an isosceles triangle has at least two sides of equal length.

Triangles can be classified as acute, right, or obtuse based on their angles.