Question 1: Calculate the value of the missing angle if two angles on a straight line are 65° and the other is unknown.

Answer: 115

Question 2: Construct a straight line with angles of 80° and an unknown angle. Find the measure of the unknown angle.

Answer: 100

Question 3: In a straight line, two angles are 120° and 40°. Is this possible? Explain your reasoning.

Answer: No, because angles on a straight line must sum to 180°, but 120° + 40° = 160°.

Question 4: Plot the graph of y=2x for x values from 0 to 5 on the grid.

Answer: Points: (0,0), (1,2), (2,4), (3,6), (4,8), (5,10)

Question 5: Construct a line with two angles of 110° and an unknown angle on a straight line. Find the unknown angle.

Answer: 70

Question 6: Two angles on a straight line are 75° and an unknown angle. What is the measure of the unknown angle?

Answer: 105

Question 7: In a scenario, a straight line is intersected by a transversal creating two angles of 85° and an unknown angle. Find the measure of the unknown angle.

Answer: 95

Question 8: A pair of supplementary angles on a straight line are 130° and an unknown angle. Calculate the unknown angle.

Answer: 50

Question 9: Identify and correct the mistake: Two angles on a straight line are 90° and 100°.

Answer: Angles on a straight line must sum to 180°, so 90° + 100° = 190°, which is incorrect. The correct angles could be 90° and 90°.

Question 10: A straight line is divided into three angles: 50°, 60°, and an unknown angle. Is this possible? Justify your answer.

Answer: No, because the sum of angles on a straight line must be 180°, but 50° + 60° + unknown > 180° unless unknown is negative, which is impossible.

Question 11: Find the measure of an angle adjacent to a 75° angle on a straight line.

Answer: 105