Classify an angle of 135

Step by step

The question

Question: find what kind of angle 135° is.

1 Compare with 90° and 180°

There are five kinds of angles.

Each name says how big the angle is, next to 90° and 180°.

135 is more than 90, but less than 180.

Careful!

Obtuse is bigger than a square corner, but smaller than a straight line.

2 Name it

So 135° is obtuse.

3 Check

Let's check with the picture.

The dashed line up makes a square corner: 90°.

The dashed line to the left makes a straight line: 180°.

Our angle opens wider than the square corner, but not as far as the straight line.

So it is obtuse.

Let's look back.

First: compare with 90° and 180°.

Then: name it.

Last: check.