## What special properties do isosceles triangles have?

An Isosceles Triangle has the following properties: Two sides are congruent to each other. The third side of an isosceles triangle which is unequal to the other two sides is called the base of the isosceles triangle. The two angles opposite to the equal sides are congruent to each other.

What is unique about an isosceles triangle?

An isosceles triangle therefore has both two equal sides and two equal angles. An equilateral triangle is therefore a special case of an isosceles triangle having not just two, but all three sides and angles equal.

### Are isosceles triangles unique triangles?

Isosceles triangles are special and because of that there are unique relationships that involve their internal line segments.

What are the special properties of a triangle?

Properties of a triangle A triangle has three sides, three angles, and three vertices. The sum of all internal angles of a triangle is always equal to 180°. This is called the angle sum property of a triangle. The sum of the length of any two sides of a triangle is greater than the length of the third side.

## What are 3 properties of an isosceles triangle?

An Isosceles Triangle has the Following Properties:

• It has two sides of equal length.
• The angles opposite to equal sides are equal in measure.
• The altitude from vertex A to the base BC is the perpendicular bisector of the base BC.
• The altitude from vertex A to the base BC is the angle bisector of the vertex angle ∠ A.

What are the two rules of isosceles triangles?

The rule for an isosceles triangle is that the triangle must have two sides of equal length. These two sides are called the legs of the triangle and the unequal side is called the base. The isosceles triangle theorem further states that the angles opposite to each of the equal sides must also be equal.

### What is the function of isosceles triangle?

Isosceles triangles have been used as decoration from even earlier times, and appear frequently in architecture and design, for instance in the pediments and gables of buildings. The two equal sides are called the legs and the third side is called the base of the triangle.

What is the isosceles triangle theorem?

If two sides of a triangle are congruent , then the angles opposite to these sides are congruent.

## What are the five properties of a triangle?

Five properties of a triangle are listed below:

• A triangle has three sides, three vertices, and three angles.
• The sum of the three interior angles of a triangle is always 180°.
• The sum of the length of two sides of a triangle is always greater than the length of the third side.

What two features make an isosceles triangle?

An isosceles triangle has two equal sides (or three, technically) and two equal angles (or three, technically). The equal sides are called legs, and the third side is the base. The two angles touching the base (which are congruent, or equal) are called base angles.

### What are the rules of an isosceles triangle?

Rules for Isosceles and Equilateral Triangles. The given triangle is an equilateral, it is said to be equiangular. The two sides of the triangle are said to be congruent, and then the two sides of the triangles are the base angles of an isosceles triangles. The triangle is said to be an equiangular, it is represented as equilateral.

What are facts about the isosceles triangle?

The equal sides of an isosceles triangle are known as the ‘legs.’ The third and unequal side of an isosceles triangle is known as the ‘base.’ The angle made by the two equal sides of an isosceles triangle is known as the ‘ vertex angle.’ The angles that involve the base of an isosceles triangle are known as the ‘base angles.’

## Does isosceles triangle have 2 equal angles?

An isosceles triangle therefore has both two equal sides and two equal angles. The name derives from the Greek iso (same) and skelos (leg).

What are the parts of an isosceles triangle?

Parts of an Isosceles Triangle. The two equal sides of the isosceles triangle are legs and the third side is the base. The angle between the equal sides is called the vertex angle.