Theorem 3 Betweenness of Rays

You will have to study the proof on page 95 carefully. Ask for help if you need it.

Theorem 4 Angle Bisector Theorem

Look at bisecting an angle

Try this vocabulary quiz

Try measuring angles

Exercises:

(these seem difficult; you may need help)

Set I

#14-18

Set II

#19-22

In this group, you are asked to match the statements with their theorems or definitions.

Hint: Look back at pages 94-95

#23-26 -- skip these ones.

#27 -30

This is algebra review.

If

ASN = 5x

and

NSD = 3x + 28

and you know because SN is bisecting the angle that both these two angles are equal,

then

ASN = NSD

Knowing that, can you do the rest?

#31-34

- Look at the facts about the figure.
- Hint: AJD + DJE = AJE (because of the Betweenness of Rays)
- Substitute the terms for the angle names, as you did in the last group of problems, and then you have an algebra problem that you can solve.
- When you see problems like this, ALWAYS look for ways to do this.

- Do these proofs with me.

This was a long lesson.... tomorrow will be an optional day.

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