Question

1. draw an obtuse angle.

Explanation:

Step1: Draw a ray

Start by drawing a horizontal ray, say \( \overrightarrow{OA} \), with \( O \) as the vertex.

Step2: Place the protractor

Place the center of the protractor at \( O \) and align the baseline of the protractor with \( \overrightarrow{OA} \).

Step3: Mark a point

Find a degree measure between \( 90^\circ \) and \( 180^\circ \) (e.g., \( 120^\circ \)) on the protractor and mark a point \( B \) at that position.

Step4: Draw the second ray

Remove the protractor and draw the ray \( \overrightarrow{OB} \) from \( O \) through \( B \). The angle \( \angle AOB \) is now an obtuse angle (since \( 90^\circ < \angle AOB < 180^\circ \)).

Answer:

An obtuse angle (e.g., \( 120^\circ \) angle) is drawn as described above. (Visually, it's an angle wider than a right angle but less than a straight angle.)