Lines Angles and Triangles

Angle 1 and Angle 5 are examples of which type of angle pair?

• Alternate exterior angles

• Alternate interior angles

• Vertical angles

• Corresponding angles

∠1 and ∠3 can best be described as -

• complementary angles

• supplementary angles

• vertical angles

• adjacent angles

Given the following two parallel lines that have been cut by a transversal. Which two angles would be Alternate Exterior?

In this picture, two parallel lines are cut by a third line, called a transversal. How many vertical angle pairs can you find?

• 2 pairs of vertical angles

• 3 pairs of vertical angles

• 4 pairs of vertical angles

• 8 pairs of vertical angles

In this picture, two parallel lines are cut by a third line, called a transversal. What is the maximum number of Linear Pairs of angles you can find?

• 2 Linear Pairs

• 4 Linear Pairs

• 6 Linear Pairs

• 8 Linear Pairs

• Sweet!

• Cool.

• Right on.

• They are congruent

• They form vertical angles

• They form a linear pair

• They are non-adjacent angles

So, if m∠2+m∠4=180° and m∠6=m∠2, we can substitute to get this equation:  m∠6+m∠4=180°.  Conclude