0

# Why does a triangles angles always add up to 180 degrees?

Updated: 10/19/2022

Wiki User

12y ago

It is a consequence of Euclids's parallel postulate.

Wiki User

12y ago

Earn +20 pts
Q: Why does a triangles angles always add up to 180 degrees?
Submit
Still have questions?
Related questions

### What is true about the angles and sides on similar triangles?

All the Angles and sides on Triangles are always going to equal 180 Degrees

### Are all triangles 180 degrees?

Yes. The three angles of a triangle always add up to 180 degrees.

### Sum of the angles of a triangles?

The sum of the 3 angles of a triangle will ALWAYS equal 180 degrees.

### How many degrees does a isosceles triangle have?

all triangles have 180 degrees even isosceles

### What is the measurement of a triangles angle?

The total sum of all angles in any triangle is 180 degrees.

### What is similar about all triangles?

they all have three sides, three angles, and the sum of their angles is always 180 degrees.

### Are all triangles 180 degrees and what rule is it?

Yes the 3 interior angles of any triangle always add up to 180 degrees

### Can a triangle have two angles?

No, a triangle cannot have two angles. Triangles always have three sides and three angles that add up to 180 degrees.

### Using indirect reasoning to show that a triangle cannot have two right angles?

Triangles total 180 degrees. Triangles have three angles. Two angles of 90 degrees total 180 degrees.

### Interior and exterior angles of triangles?

Interior angles are 180 degrees Exterior angles are 360 degrees

### How many degrees are there in an isosceles triangle?

The sum of the internal angles of any triangle is always 180 degrees. It makes no difference what type of triangle; it is a fundamental truth of all triangles.

### Do all triangles have the same sum of their angles?

Yes, all triangles have the sum of their angles as 180 degrees.