This is a great mathematics puzzle to measure your basic math knowledge. Let’s challenge your brain!

## Challenge:

The ratio of three sides of a triangle is 1:2:3. What is the smallest angle?

### The Absolute Best Book** to ****challenge your Smart Student!**

The correct answer is30 degree.

There is the same ratio for the angels. Therefore, the ratio of three angles of the triangle is also 1:2:3.

Let X be the smallest angle. Then, the next two angels are 2X and 3X.

X + 2X + 3X = 180 → 6X = 180 → X = 30

The smallest angel is 30 degree.