Geometry Ch 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Definition of Degree | Unit of measure for angles
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| Acute angle | An angle measuring more than 0 and less than 90 degrees
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| Right angle | An angle measuring 90
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| Obtuse angle | An angle measuring more than 90 but less than 180
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| Straight angle | An angle that is 180
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| Things you should assume | Straight lines and angles
Collinearity of points
Betweenness of points
Relative positions of points
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| Things you should not assume | Right angles
Congruent segments
Congruet angles
Relative sizes of segments & angles
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| Def of Theorem | Mathematical statement that can be proven
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| Segment bisector | a point, segment, or line that deivides a segment into 2 congruent segments
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| Midpnt | Bisection pnt of segment
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| Deductive Structure | a system of thought in which conclusions are justifies by means of previously assumed or proved statements (theorems)
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| Postulate | an unproved assumption
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| Conditional Statement | "If p, Then q"
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| Converse | Switch if and then statements
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| inverse | negate(if not p, then not q)
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| Contrapositive | Negative and switch (if not q, then not p)
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| If the angles are congruent to the same angle... | They are congruent to each other
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| If angles are congruent to congruent angles... | they are congruent to each other
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| Def Opp. Rays | Two rays with a common endpnt. that form a line.
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| vertical angles are... | congruent
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| Def of median of triangle | line segment drawn from any vertex of the triangle to the midpnt of the opposite side.
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| Def. of Altitude | drawn from any vertex of the triangle to the opposite side and its perpendicular to that side.
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| Auxiliary lines | additional lines or segments that dont appear in the original diagram
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| Two points determine a... | line
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| CPCTC | Corrosponding parts of congruent triangles are congruent
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| all radii are | congruent
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| slide | moving a figure without changing its position
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| scalene triangle | triangle with no congruent sides
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| Isos. Triangle | Triangle with at least 2 congruent sides
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| HL Postulate | If the Hypotenuse and the leg of one triangle are congruent to the hypotenuse and corrosponding leg of another triangle, the triangles are congruent.
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Created by:
nickbeeler
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