You can put anything into a circle. It' not for marks (usually), so no one will see it but you.
You can organize the body of your paper. Points underneath the main circle give you a hint which way you should try to look up information.
You can erase certain things because they are irrelevant, or you can't find information, or the information is too complex to be of much value.
Sometimes a topic is overwhelming. You have to look up information on the information you just found and it's not suitable for 500 words. For example you are asked to write about an experience that influenced your life the most. Let us say it was a visit to the doctor's office. He gives you a written report of what he found. You find that it is so full of technical terms that you have no way of writing why it influenced you so much. You are too busy trying to get to the bottom of the jargon.
Finally mapping points at material you really do want to write about. It also lets you look at the tone you are going to use to write it. There's no harm in trying a few sentences to see what it sounds like and putting them in large circles underneath your original circles.
If you read the book you will understand! :D
Question 1: The answer is <u>c. Yes, angles are complementary if (and only if) their sum measures to 90 degrees.</u>
This definition of complementary is reversible because both parts of the sentence, whatever order they are put, are true. And we can be sure of it, when rewriting the sentence into both conditional statement and conditional converse. Both conditionals, have a part of a sentence that is called "hypothesis" and other that is called "conclusion".
- In conditional, the hypothesis clause comes first, and then the conclusion: <em>If the angles are complementary, then their sum measures to 90 degrees.</em>
- In converse, the conclusion clause comes first and then the hypothesis: <em>If the sum of angles measures to 90 degrees, then the angles are complementary.</em>
When both sentences in the conditional and in the converse are true, then it is can be a biconditional sentence. Furthermore, the general structure of this type of sentence is First clause + If (and only if) + Second clause.
Question 2: The answer is <u>d. a ray is a bisector of an angle if and only if it splits the angle into two angles.</u>
A ray is a bisector of an angle only when the line segment splits the angle into two <u>equal</u> parts.
