To complete this worksheet, you need to draw the second line (arm) for each angle using a protractor. Here is how to do it for each one:
General Steps:
1. Place the center point of your protractor on the dot at the end of the existing line.
2. Make sure the "0°" line on the protractor lines up perfectly with the existing line.
3. Find the degree number asked for in the problem on the curved edge of the protractor.
4. Make a small mark at that number.
5. Use a ruler to draw a straight line from the center dot to your new mark.
Specific Instructions for Each Angle:
*
∠ 25°: Line up the protractor. Find
25 on the scale. Make a mark and draw a line to it. This will be a narrow, sharp angle.
*
∠ 45°: Line up the protractor. Find
45 on the scale. Make a mark and draw a line. This looks like half of a right angle (like the corner of a square cut in half diagonally).
*
85°: Line up the protractor. Find
85 on the scale. Make a mark and draw a line. This will look almost like a perfect "L" shape (90°), but just slightly tilted inward.
*
∠ 125°: Line up the protractor. Find
125 on the scale. Make a mark and draw a line. This is an obtuse angle (wider than an "L" shape).
*
∠ 35°: Line up the protractor. Find
35 on the scale. Make a mark and draw a line. This is wider than the 25° angle but narrower than the 45° angle.
*
∠ 100°: Line up the protractor. Find
100 on the scale. Make a mark and draw a line. This is slightly wider than a perfect "L" shape (90°).
Final Answer:
Draw the missing arm for each angle by measuring the specified degrees (25°, 45°, 85°, 125°, 35°, and 100°) from the baseline using a protractor and connecting the center point to the measured mark.
Parent Tip: Review the logic above to help your child master the concept of 4th grade math worksheet angles.
