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Geometry Midterm
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Geometry & Trigonometry
10th
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22 Terms
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1
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inductive reasoning
reasoning based on specific examples or past events
2
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conjecture
unproven statement or rule based on inductive reasoning
3
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counterex
an example that proves the conjecture false
4
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conditional statement
an “if, then” statement that relates a hypothesis to a conclusion; p→q
5
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biconditional statement
an “if and only if” statement where the rules work both ways
p
6
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converse
order switch; q→p
7
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negation
making one negative “not” \~p
8
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inverse
same order, both negative \~p→ \~q
9
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contrapositive
switch and negative \~q →\~p
10
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deductive reasoning
reason using given and previously known facts
11
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rhombus
4 equal sides, diagonals are perpendicular
12
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rectangle
diagonals are congruent
13
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square
4 equal sides, perpendicular and conguent diagonals
14
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square root (x2 -x1)^2+(y2-y1)^2
distance formula
15
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180 (n-2)
interior angle measure formula
16
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x, x, root 2x
side values of a 45 45 right triangle
17
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x, root 3x, 2x
side values of a 30 60 right triangle
18
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n/360 x 2 PI r
arc length formula
19
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n/360 x Pi r ^2
area sector formula
20
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rhombus
diagonals are perpendicular and/or a diagonal bisects 2 angles
21
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rectangle
diagonals are congruent
22
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square
if the diagonals are perpendicular and congruent, and/or a diagonal bisects angles and the diagonals are congruent
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