Properties of Isosceles Triangles An isosceles triangle is a triangle in which two of the angles have the same measure. This means that the opposite angles...
Properties of Isosceles Triangles
An isosceles triangle is a triangle in which two of the angles have the same measure. This means that the opposite angles are congruent, and the two equal angles are congruent.
Angles in an isosceles triangle are congruent, meaning they have the same measure.
The base angles of an isosceles triangle are congruent.
The perimeter of an isosceles triangle is divided into three equal parts.
The area of an isosceles triangle is divided into four equal parts.
Isosceles triangles have several properties related to their angles and sides.
The base angles of an isosceles triangle are congruent and have the same measure.
The two equal angles are congruent and have the same measure.
The opposite angles are congruent.
The perimeter of an isosceles triangle is divided into three equal parts.
The area of an isosceles triangle is divided into four equal parts.
Examples:
A triangle with angles measuring 40 degrees and 40 degrees is an isosceles triangle.
The base angles of a triangle with angles measuring 60 degrees and 60 degrees are congruent and have the same measure.
The opposite angles of a triangle with angles measuring 100 degrees are congruent