# How Many Parallel Sides Can a Triangle Have (Simple Guide)

Do you want to know how many parallel sides can a triangle have?

A triangle is a three-sided polygon. In Euclidean geometry, any triangle can be constructed by joining three points with straight lines, regardless of the shape of the triangle. The sum of the angles in a triangle is always 180 degrees.

In this simple guide, we will explore how many parallel sides a triangle can have!

## How Many Parallel Sides Can a Triangle Have?

A triangle can have 0, one, or two parallel sides. If a triangle has exactly one parallel side, then it is called an isoceles triangle. If a triangle has exactly two parallel sides, then it is called a equilateral triangle.

An isoceles triangle has two congruent (equal) sides and angles. An equilateral triangle has three congruent (equal) sides and angles.

### Isoceles Triangle

If a triangle has exactly one parallel side, then it is called an isoceles triangle. The two other sides are called the base and height.

The base is the side opposite of the angle that is equal to the other two parallel sides. The height is the length of the line segment from the base to the vertex that is opposite it.

An isoceles triangle has two congruent (equal) sides and angles.

### Equilateral Triangle

If a triangle has exactly two parallel sides, then it is called an equilateral triangle. All three sides are the same length and all three angles are 60 degrees.

An equilateral triangle has three congruent (equal) sides and angles.

Q: Can a triangle have 3 parallel sides?

A: No, a triangle can only have 0, one, or two parallel sides.

Q: What is an isoceles triangle?

A: An isoceles triangle is a triangle with exactly one parallel side. The other two sides are called the base and height.

Q: What is an equilateral triangle?

A: An equilateral triangle is a triangle with exactly two parallel sides. All three sides are the same length and all three angles are 60 degrees.

Q: How can I find the height of a triangle?

A: The height of a triangle is the length of the line segment from the base to the vertex that is opposite it.

Q: Do all Rhombuses have 2 pairs of parallel sides?

A: No, a Rhombus is a parallelogram with four congruent sides. It can have 0, one, or two pairs of parallel sides.

Q: How can I find the angles in a triangle?

A: The sum of the angles in a triangle is always 180 degrees.

Q: How many pairs of parallel sides are in a polygon?

A: A polygon can have 0, one, two, or more pairs of parallel sides.

Q: What is a parallelogram?

A: A parallelogram is a quadrilateral with two pairs of parallel sides.

Q: How can I find the area of a triangle?

A: The area of a triangle is half the base times the height.

Q: How can I find the perimeter of a triangle?

A: The perimeter of a triangle is the sum of the lengths of its sides.