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| HOW DO I PROVE THAT A BICONDITIONAL IS TRUE? |
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1) WRITE IT IN IF-THEN FORM
2) WRITE THE CONVERSE OF THE IF-THEN FORM
3) IF BOTH SENTENCES FROM #1 AND #2 ARE TRUE, THEN THE BI... IS TRUE! |
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| SYMBOL FOR A BICONDITIONAL |
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(1) IF ..., THEN ...
(2) SPECIFIC IF
(3) SPECIFIC THEN |
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(1) IF A, THEN B
(2) IF B, THEN C
(3) IF A, THEN C |
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| SEGMENT ADDTION POSTULATE |
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AC = AB + BC
2 PIECES ADD UP TO THE WHOLE! |
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SAME THING ON BOTH SIDES!
7 = 7
AB = AB
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FLIPPED ACROSS THE =
AB = CD, CD = AB |
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IF 2 THINGS = THE SAME THNG, THEN THEY ARE = !!
AB = CD AND EF = CD SO... AB = EF |
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| ADD UP TO 180 (ARE SUPPLEMENTARY) |
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