Lines, Angles, & Triangles

What is the definition of an angle?

• The space between two intersecting lines

• Lines that never cross

• Lines that cross at any angle

• Lines that cross at a 90 degree angle

What are parallel lines?

• The space between two intersecting lines

• Lines that never cross

• Lines that cross at any angle

• Lines that cross at a 90 degree angle

What are intersecting lines?

• The space between two intersecting lines

• Lines that never cross

• Lines that cross at any angle

• Lines that cross at a 90 degree angle

What are perpendicular lines?

• The space between two intersecting lines

• Lines that never cross

• Lines that cross at any angle

• Lines that cross at a 90 degree angle

What is an acute angle?

• Measures less than 90 degrees

• Measures more than 90 degrees

• Measures exactly 90 degrees

• Looks like a straight line and measures 180 degrees

What is an obtuse angle?

• Measures less than 90 degrees

• Measures more than 90 degrees

• Measures exactly 90 degrees

• Looks like a straight line and measures 180 degrees

What is a right angle?

• Measures less than 90 degrees

• Measures more than 90 degrees

• Measures exactly 90 degrees

• Looks like a straight line and measures 180 degrees

What is a straight angle?

• Measures less than 90 degrees

• Measures more than 90 degrees

• Measures exactly 90 degrees

• Looks like a straight line and measures 180 degrees

What is a right triangle?

• A triangle that has one 90 degree right angle

• A triangle that has all acute angles

• A triangle that has one obtuse angle

• A part of a line that has 2 endpoints

What is an acute triangle?

• A triangle that has one 90 degree right angle

• A triangle that has all acute angles

• A triangle that has one obtuse angle

• A part of a line that has 2 endpoints