To solve the problem of matching the angles shown in the protractors to their corresponding degree measures, we need to carefully read each protractor and determine the angle it is measuring. Here's a step-by-step explanation:
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Step 1: Understand how to read a protractor
- Protractors have two scales: one starting from 0° on the left and increasing clockwise, and the other starting from 0° on the right and increasing counterclockwise.
- The angle is measured by aligning one side of the angle with the baseline of the protractor (usually the horizontal line at the bottom) and reading the degree where the other side of the angle intersects the protractor.
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Step 2: Analyze each protractor
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Protractor 1:
- The baseline is aligned with the 0° mark on the left scale.
- The other side of the angle points to 45° on the left scale.
-
Angle = 45°
####
Protractor 2:
- The baseline is aligned with the 0° mark on the left scale.
- The other side of the angle points to 36° on the left scale.
-
Angle = 36°
####
Protractor 3:
- The baseline is aligned with the 0° mark on the left scale.
- The other side of the angle points to 119° on the left scale.
-
Angle = 119°
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Protractor 4:
- The baseline is aligned with the 0° mark on the left scale.
- The other side of the angle points to 70° on the left scale.
-
Angle = 70°
####
Protractor 5:
- The baseline is aligned with the 0° mark on the left scale.
- The other side of the angle points to 140° on the left scale.
-
Angle = 140°
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Step 3: Match the angles to the given options
- Protractor 1: 45°
- Protractor 2: 36°
- Protractor 3: 119°
- Protractor 4: 70°
- Protractor 5: 140°
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Final Answer:
\[
\boxed{
\begin{array}{ll}
1) & 45^\circ \\
2) & 36^\circ \\
3) & 119^\circ \\
4) & 70^\circ \\
5) & 140^\circ \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of measure angles protractor worksheet.