Angle+Addition

=__**Part 3: Angle Addition Postulate**__=


 * 1) 12 Watch this [|video], and answer this question: What is a postulate?
 * 2) 13. Watch this [|video], and answer this question: What is the Angle Addition Postulate?

Easy Problems: Use the Angle Addition Postulate
 * 14
 * 15

Hard Problems: [|*walkthrough]
 * 1) 16 Use the Angle Addition Postulate to find X:


 * 1) 17 Use the Angle Addition Postulate to find X:

Go on to part 4 or back to beginning