Why is the total angle sum in a triangle always 180 degrees?

It's based on arbitrary definitions.

They must fit in a straight line.

Triangles are defined this way in geometry.

It represents the total number of sides.

Video Explanation

Watch Video Solution

Keep Practising

Students who asked this also explored

Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.

Q1.

What is the minimum number of sides required to construct a triangle?

Q2.

If the sides of a triangle are 5 cm, 12 cm, and 13 cm, can you construct this triangle?

Q3.

When constructing an equilateral triangle with a side length of 6 cm, which tool is NOT necessary?

Q4.

How can you check if three lengths can form a triangle?