Q:
# Does a triangle have parallel sides ?

**A triangle can never have any parallel lines because there must be three angles that add up to 180 degrees, which makes it impossible for the three sides to avoid intersecting.** A parallel line can never intersect with another, and triangles must always have intersecting sides.

Credit:
Henry Burrows
CC-BY-SA 2.0

To test if two lines are parallel, try to draw a third line connecting the two and see if it forms a right angle. When drawing a third line connecting two sides of a triangle, it is never possible to form a right angle. Shapes that have parallel lines, such as parallelograms, form right angles with this new line drawn between the sides.

Learn more about Shapes-
Q:
## What are some geometry formulas for triangles?

A: A triangle is a three-sided polygon where the sum of its interior angles equals 180 degrees. Some common formulas for triangles include perimeter, the tota... Full Answer >Filed Under: -
Q:
## Why do the angles in a triangle add up to 180 degrees?

A: The three interior angles of a triangle always add up to 180 degrees, which is one of the identifying characteristics of a triangle. Each shape has propert... Full Answer >Filed Under: -
Q:
## How many degrees does an equilateral triangle have?

A: The sum of the interior angles of an equilateral triangle equals 180 degrees. This stems from the fact that the combined interior angles of any given trian... Full Answer >Filed Under: -
Q:
## What are the 30-60-90 triangle rules?

A: A 30-60-90 triangle has interior angles equal to 30, 60 and 90 degrees. This is always a right triangle with the 90-degree angle located opposite the longe... Full Answer >Filed Under: