Chapter 1 Points, Lines, Planes and Angles
Chapter 1 Points, Lines, Planes and Angles
Chapter 1 Points, Lines, Planes and Angles
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How am I going to go from #1 to #7<br />
Geo 9 Ch 1-2.2 17<br />
Now, lets try the reverse:<br />
Given:<br />
AC<br />
BD<br />
A B C<br />
D<br />
Pr ove : AB<br />
CD<br />
(WARNING!)<br />
Statements<br />
Reasons<br />
1. AC BD<br />
1.<br />
*2. AC = BD (c<strong>and</strong>y bar) 2.<br />
3. AB + BC = AC; BC + CD = BD 3.<br />
(breaking into pieces)<br />
4. AB + BC = BC + CD 4.<br />
(why do I need to put this in)<br />
4. BC = BC 5.<br />
*6. AB = CD 6.<br />
7. AB CD<br />
7.<br />
NOTES: We went from large pieces to smaller pieces. That involves ________________________<br />
The pattern for adding is: ( Small to large )<br />
1) ______________________________<br />
2) ______________________________<br />
3) ______________________________<br />
The pattern for subtracting is: ( Large to small )<br />
1) ______________________________<br />
2) ______________________________<br />
3) ______________________________<br />
Use definition of congruence on either end of the proof if needed.<br />
Everything for Add= <strong>and</strong> Sub = must be in the equality sign!
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