Question

classifying angles
look at the protractor on the right.
find the measure of each angle.

1. ∠koi 2. ∠koh
2. ∠goi 4. ∠goh

draw and name each angle.

1. 50° 6. 135°

classify each angle. write acute, right, obtuse, or straight.

1. 8. 135° 9. 180°

draw each angle. then, name the angle.

1. obtuse 11. right 12. acute 13. straight

Explanation:

Step1: Measure angles with protractor

For ∠KOI, ∠KOH, ∠GOI, ∠GOH, use the protractor shown to read the degree - measure.

Step2: Draw angles

To draw 50° angle: Use a protractor. Place the center of the protractor at a point, mark 50° and draw two rays from the point. To draw 135° angle, do the same but mark 135°.

Step3: Classify angles

An acute angle is less than 90°, a right angle is 90°, an obtuse angle is between 90° and 180°, and a straight angle is 180°. So, for 7. (a right - angled figure) it's a right angle, for 8. (135°) it's an obtuse angle, for 9. (180°) it's a straight angle.

Step4: Draw and name angles

To draw an obtuse angle: Draw an angle between 90° and 180° and name it. For a right angle, draw a 90° angle and name it. For an acute angle, draw an angle less than 90° and name it. For a straight angle, draw a 180° angle and name it.

Answer:

1. (Measure from protractor)
2. (Measure from protractor)
3. (Measure from protractor)
4. (Measure from protractor)
5. Draw a 50° angle using protractor. Name it as ∠ABC (for example).
6. Draw a 135° angle using protractor. Name it as ∠DEF (for example).
7. Right
8. Obtuse
9. Straight
10. Draw an angle between 90° and 180°, name it (e.g., ∠GHI).
11. Draw a 90° angle, name it (e.g., ∠JKL).
12. Draw an angle less than 90°, name it (e.g., ∠MNO).
13. Draw a 180° angle, name it (e.g., ∠PQR).