Question

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Explanation:

Identify the protractor measurements

Using the Angle Measurement knowledge point:

• First Image: The angle starts at \(0^\circ\) on the right side and opens to the left, pointing directly at \(60^\circ\) on the inner scale. Thus, the angle is \(60^\circ\).
• Second Image: The angle starts at \(0^\circ\) on the right side and opens wide to the left, pointing at \(120^\circ\) on the inner scale (or \(60^\circ\) on the outer scale, but the arc shows it is an obtuse angle starting from the right, which corresponds to \(120^\circ\)). Looking closely at the options in the Answer Bank, we have "The angle is \(115^\circ\)" and "The angle is \(120^\circ\)" (or similar). Let's re-examine the pointer: it is slightly past \(110^\circ\), pointing exactly at \(115^\circ\). Thus, the angle is \(115^\circ\).
• Third Image: The angle shows a straight line along the base of the protractor, with an arc indicating a full half-rotation from \(0^\circ\) to \(180^\circ\). Thus, the angle is \(180^\circ\).
• Fourth Image: The angle is a vertical line perpendicular to the base, pointing directly at \(90^\circ\). Thus, the angle is \(90^\circ\).

Match with the Answer Bank

We match each protractor image with its corresponding statement from the Answer Bank:

• First Image (pointing to \(60^\circ\)): "The angle is \(60^\circ\)"
• Second Image (pointing to \(115^\circ\)): "The angle is \(115^\circ\)"
• Third Image (straight line): "The angle is \(180^\circ\)"
• Fourth Image (right angle): "The angle is \(90^\circ\)"

Answer:

• First protractor image (acute angle): The angle is \(60^\circ\)
• Second protractor image (obtuse angle): The angle is \(115^\circ\)
• Third protractor image (straight line): The angle is \(180^\circ\)
• Fourth protractor image (right angle): The angle is \(90^\circ\)