Measuring Angles Using a Protractor Worksheets - Free Printable

To solve this problem, we need to read the measurement on each protractor and match it to the correct angle value from the list on the right.

How to read a protractor:
1. Look at where the bottom line of the angle sits. It is on the zero line.
2. Check which number scale starts at 0.
* If the zero is on the right, use the inner numbers (the smaller ones inside).
* If the zero is on the left, use the outer numbers (the larger ones outside).
3. Follow the other line of the angle up to see what number it points to.

Let's go through them one by one:

1. The bottom line is on the right side. We start at 0 on the inner scale. The top line points to 140.
* Match: 140°

2. The bottom line is on the left side. We start at 0 on the outer scale. The top line points straight up to 90.
* Match: 90°

3. The bottom line is on the right side. We start at 0 on the inner scale. The top line points to 160.
* Match: 160°

4. The bottom line is on the right side. We start at 0 on the inner scale. The top line points to 20.
* Match: 20°

5. The bottom line is on the left side. We start at 0 on the outer scale. The top line points to 45 (it is halfway between 40 and 50).
* Match: 45°

Final Answer:
1. 140°
2. 90°
3. 160°
4. 20°
5. 45°