Use the OUTER SCALE on the protractor to determine the measure of the given angle.

(3 points)
The LEFT ray goes through
degrees on the protractor.

The RIGHT ray goes through
degrees on the protractor.

The measure of the ANGLE is
degrees.

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1 answer

To determine the measure of the angle using the outer scale on the protractor, follow these steps:

  1. Identify the Left Ray Measurement: Locate where the left ray intersects with the outer scale of the protractor. Record this measurement in degrees.

  2. Identify the Right Ray Measurement: Locate where the right ray intersects with the outer scale of the protractor. Record this measurement in degrees.

  3. Calculate the Angle Measure:

    • If the left ray reads a lower measurement than the right ray, simply subtract the left ray measurement from the right ray measurement.
    • If the left ray reads a higher measurement than the right ray, you'll need to subtract the larger from the smaller and may need to add 180° if it crosses the 0° mark.

Let’s say you found:

  • The left ray goes through 30 degrees on the protractor.
  • The right ray goes through 70 degrees on the protractor.

Then, the measure of the angle would be calculated as follows:

\[ \text{Angle Measure} = \text{Right Ray} - \text{Left Ray} = 70^\circ - 30^\circ = 40^\circ \]

Thus, the final answer would be:

  • The measure of the ANGLE is 40 degrees.

Make sure to input the actual measurements you observed from the protractor for your specific angle.