Exploring Angles and Lines

Which of the following is an acute angle?

Which angle is a right angle?

Which of these angles is obtuse?

What tool do you use to measure angles?

• Ruler

• Protractor

• Compass

• Calculator

If two lines never meet, no matter how far they are extended, what are they called?

• Intersecting lines

• Perpendicular lines

• Parallel lines

• Symmetrical lines

Which of the following best describes perpendicular lines?

• Lines that never meet

• Lines that cross at any angle

• Lines that are curved

Which of these is an example of symmetry?

• A triangle with all sides different

• A square folded in half with both sides matching

• A line that never ends

If two lines cross each other, what are they called?

• Parallel lines

• Intersecting lines

• Perpendicular lines

• Symmetrical lines

Which angle is less than a right angle?

What is the measure of a right angle?