# Geo Journal 2(1).

```By: Jean Luc van Beusekom Aldana
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If I have a grade of 65 of more then I pass the
year
If I get good grades then my parents will be
happy
If I sleep early then I'm going to have energy
A if-then statement is when you say that if
something happens another thing will happen
because of that
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A counter example is a reason that says why
something can be by another thing
If I get good grades then my mom will be
happy (counter ex. : if I clean my room then my
mom will be happy)
If I sleep early then I will have energy (counter
ex. : If I drink an energy drink then I will have
energy)
If I get good grades then I will go to the party
(counter ex. : if i behave then ill go to the party
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Definition is the description of what something is.
Cell phone: a hand-held mobile radiotelephone for use
in an area divided into small sections, each with its
organ - a fully differentiated structural and functional
unit in an animal that is specialized for some particular
function
Mathematics is the study of quantity, structure, space,
and change. Mathematicians seek out patterns,
formulate new conjectures, and establish truth by
rigorous deduction from appropriately chosen axioms
and definitions.
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Biconditional statement is when theres only one reason
why things happens.
They are used to explain specific things, they are
important to give only one reason to the things
I pass to the next grade if and only if my average is
above 65
I will know the answers if and only if I study
I know what it feels like if I only if I try it
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Deductive reasoning is when you grab different facts
and out them together to come up with a conclusion
1.If you jump you can run
If you run you can walk
So if you jump you can walk
2. If you breath, you have lungs
If you have lungs you are alive
So if you breath you are alive
3.If you are a human you are a living species
If you are a living species you reason
If you are a human you reason
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Law of detachment and law of sillogism.
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Is when two angle are together and add up to
180 degrees
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Is when two angles are equal and this is used in
the proofs
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To write a 2 column proof you need to do 2
columns one that says statements and one
reason
statement
reason
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Vertical angles is 4 angles which add up to 360
degrees
90
90
90
90
2
1
3
4
```