Lines and Angles Quiz

What type of lines never meet, even if extended?

1. Parallel lines
2. Perpendicular lines
3. Curved lines
4. Intersecting lines

Answer: (a) Parallel lines

Which of these is an example of perpendicular lines in real life?

1. The edge of a circle
2. The sides of a football
3. The hands of a clock at 3 o’clock
4. The sides of a triangle

Answer: (c) The hands of a clock at 3 o’clock

James says: “If two lines cross and form four angles, then all the angles must be the same.” Mia disagrees and says: “Only if the lines are perpendicular will all angles be the same.” Who is correct and why?

1. James is right; all intersecting lines make equal angles
2. Mia is right; only perpendicular lines make four equal angles
3. Both are wrong; angles always change
4. Both are right; lines always make right angles

Answer: (b) Mia is right; only perpendicular lines make four equal angles

In a quadrilateral, three angles measure 90°, 80°, and 70°. Since the sum of the angles in a quadrilateral is always 360°, what must be the measure of the fourth angle?

1. 110°
2. 120°
3. 100°
4. 90°

Answer: (b) 120°

In a rectangle, one diagonal is drawn. How many triangles are formed inside?

1. 1
2. 4
3. 3
4. 2

Answer: (d) 2

Two walls meet at a corner. A clock is hung on that corner forming an angle of 90°. If one wall is rotated by 15° inward, What will be the new angle between the walls?

1. 95°
2. 85°
3. 75°
4. 105°

Answer: (c) 75°

A square has four corners. If one of its corners is cut off slightly (like making a slant), what new type of angle is likely formed there?

1. Acute angle
2. Reflex angle
3. Right angle
4. Obtuse angle

Answer: (a) Acute angle

You look at the corners of a square table. You cut one corner off in the shape of a triangle. Now how many angles does the table have?

1. 2
2. 3
3. 4
4. 5

Answer: (d) 5

A traffic sign is in the shape of a regular hexagon with an interior angle of 120°. How many angles does it have and what type are they?

1. 6 straight angles
2. 6 right angles
3. 6 acute angles
4. 6 obtuse angles

Answer: (d) 6 obtuse angles

Which of the following objects in a classroom clearly shows a pair of perpendicular lines?

1. The edges of a blackboard
2. The curve of a globe
3. The legs of a round stool
4. The top and bottom of a clock

Answer: (a) The edges of a blackboard