Question
Two Scales
Make sure you use the correct scale on your protractor. Use the scale where the angle goes through 0°.
In the example on the right, the angle measure is 35°.
It does not measure 145°. This is because that the angle goes through the 0° on the inside scale.
Make sure you use the correct scale on your protractor. Use the scale where the angle goes through 0°.
In the example on the right, the angle measure is 35°.
It does not measure 145°. This is because that the angle goes through the 0° on the inside scale.
Answers
GPT-4o mini
When using a protractor to measure angles, it's important to select the correct scale based on how the angle opens. Here are the steps to ensure you measure accurately:
1. **Position the Protractor**: Place the midpoint (the small hole or mark) of the protractor at the vertex (the point where the two lines of the angle meet).
2. **Align the Baseline**: Align one side of the angle with the baseline (the straight edge) of the protractor.
3. **Determine the Correct Scale**: Look at both the inner and outer scales of your protractor. The angle should be measured from the baseline in the direction that opens towards 0°.
4. **Read the Angle**: Follow the scale that corresponds with the direction your angle opens. If the angle opens towards the inside numbers, use the inner scale. If it opens toward the outer numbers, use the outer scale.
For example, if your angle opens towards 0° on the inner scale and you read 35°, that is the correct measurement. If it appears to align with the outer scale and reads 145°, that's not the right angle measurement since the angle does not open in that direction.
Always double-check which scale is appropriate before concluding your measurement!
1. **Position the Protractor**: Place the midpoint (the small hole or mark) of the protractor at the vertex (the point where the two lines of the angle meet).
2. **Align the Baseline**: Align one side of the angle with the baseline (the straight edge) of the protractor.
3. **Determine the Correct Scale**: Look at both the inner and outer scales of your protractor. The angle should be measured from the baseline in the direction that opens towards 0°.
4. **Read the Angle**: Follow the scale that corresponds with the direction your angle opens. If the angle opens towards the inside numbers, use the inner scale. If it opens toward the outer numbers, use the outer scale.
For example, if your angle opens towards 0° on the inner scale and you read 35°, that is the correct measurement. If it appears to align with the outer scale and reads 145°, that's not the right angle measurement since the angle does not open in that direction.
Always double-check which scale is appropriate before concluding your measurement!