Unit 2:Day 4

Today, students will learn about Vertical angles and multiplication of radicals.

Vertical Angles are the angles opposite each other when two lines cross.

In this example, a° and b° are vertical angles, and they are equal.

Multiplying radicals

When multiplying radicals, you must multiply the numbers OUTSIDE (O) the radicalsAND then multiply the numbers INSIDE (I) the radicals.

  

then simplify

1.  Multiply the outside numbers first	3 • 1 = 3
2.  Multiply the inside numbers
3.  Put steps 1 and 2 together and      simplify.
4.  Answer:

 Quiz

1) Here is a pair of parallel lines and a transversal:

Which of the following pairs of angles are vertical angles (also called "vertically opposite angles")?

A

w and z

B

w and t

C

s and z

D

t and y

2) (5√3)*(7√2)

3) 2√18 * 3√8

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Answer key

1) Vertical Angles are the angles opposite each other when two lines cross 

w and z are vertical angles.

2) (5√3)*(7√2)

      5 * 7         3* 2

          35√6

                

3)    2√18 * 3√8

      2*3          18*8

        6√144

              12

         6√12