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25 Cards in this Set
- Front
- Back
Conjecture |
An unproven statement that is based on observations |
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Inductive reasoning |
Looking for patterns and making conjectures |
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Counterexample |
An example that shows a conjecture false |
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Point |
Represented by a small dot |
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Line |
extends in one dimension. It is usually represented by a straight line with two arrow heads to indicate that the line extends without end in two directions |
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Collinear Points |
Points that lie on the same plane |
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Coplanar points |
Points that lie on the same plane |
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Postulates or Axioms |
Rules that are accepted without proof |
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Distance formula |
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Congruent Segments |
Segments that have the same length |
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Vertex |
Initial Point |
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angle addition postulate ( angle adb + bdc= adc |
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Adjacent angles |
share a common vetex and side but have no common interior points |
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midpoint/bisects |
The segment into two congruent segments |
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Segment bisectors |
a segment, ray, line or plane that intersects a segment at its midpoint |
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Midpoint formula |
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angle bisector |
divides an angle into two adjacent angles |
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Vertical Angles |
Their sides form two pairs of opposite rays |
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Linear pair |
Two adjacent angles |
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Complementary Angles |
The sum of their measures is 90 degrees |
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Supplementary Angles |
The sum of the measures is 180 degrees |
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Perimeter and Area of a square |
P=4s A= s squared |
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Perimeter and area of a triangle |
p= a+b+c a= 1/2bh |
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Perimeter and Area ofRectangle |
P= 2l+2w A= lw |
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Circumference and area of Circle |
C= (2)(pi)(r) A= (pi)(r)(squared) |