Lines and Angles

A figure with 2 rays meet at a point called vertex.

• angle

• parallel lines

• line segments

• points

An angle measures exactly 90°.

• acute angle

• right angle

• obtuse angle

• straight angle

An angle measures less than 90°.

• straight angle

• obtuse angle

• acute angle

• right angle

An angle measures between 90° and 180°.

• right angle

• obtuse angle

• straight angle

• acute angle

Which of the following is NOT an acute angle?

• 45°

• 66°

• 95°

• 89°

Which of the following object has a right angle. Choose 3 objects. (3 answers)

• flatscreen television

• round table

• triangular window

• rectangular door

• a square tile

What is a device or tool used in measuring angle?

In angle <rob or angle <bor, what is the vertex and legs?

• vertex= r

  legs= ray or

  ray ob

• vertex= o

  legs= ray or

  ray ob

• vertex= b

  legs= ray or

  ray ob

• vertex= b

  legs= ray ro

  ray bo

We can use centimeter or meter in measuring an angle.

• TRUE

• FALSE

An angle measures 92° is an obtuse angle.

• TRUE

• FALSE