4th Grade Measuring and Drawing Angles Test Solutions and Scoring (PDF)

1. \(360 \div 4 = 90\)°
2. \(3 \times 90 = 270\)°

Scoring: 1 point for each correct answer with the degree sign or the word degrees.

1. 62° is less than 90°: acute
2. 108° is greater than 90°: obtuse

Scoring: 1 point for each correct classification.

1. The ray crosses 65 on the scale that starts at 0: 65°
2. 65 is less than 90: acute

Scoring: 1 point for the measure (accept 63° to 67°), 1 point for the classification that matches the answer.

Place the protractor on the vertex, mark 150 on the scale, and draw a ray through the mark.

Scoring: 1 point for a second ray starting at the vertex, 1 point for an angle within 5 degrees of 150°.

1. \(100 – 63 = 37\)°. Check: \(63 + 37 = 100\).
2. 100° is greater than 90°: obtuse

Scoring: part a, 1 point for subtracting and 1 point for the correct angle. Part b, 1 point.

1. \(48 + 72 = 120\), and \(180 – 120 = 60\). x = 60°.
2. 60° is less than 90°: acute

Scoring: part a, 1 point for adding the known angles and 1 point for the correct x. Part b, 1 point.

1. \(360 \div 12 = 30\)°
2. \(5 \times 30 = 150\)°
3. 7 slices are left: \(7 \times 30 = 210\)°. Check: \(150 + 210 = 360\).

Scoring: 1 point for each correct part.

1. \(7 \times 30 = 210\)°
2. \(360 – 210 = 150\)°
3. From 12 to 4 is \(4 \times 30 = 120\)°

Scoring: 1 point for each correct part.