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15 Cards in this Set
- Front
- Back
Definition: Collinear
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Two or more points that lie on the same line.
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Definition: Non-Collinear
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Points that do not lie on the same line.
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Definition: Coplaner
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Two or more points that lie on the same plane.
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Segment Addition Postulate
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If Q is between P and R, then PQ + QR = PR. If PQ + QR = PR, then Q is between P and R.
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Pythagorean Theorem
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If a triangle is right, then the sum of the squares of the measures of the legs equals the square of the measure of the hypotenuse.
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Definition of a Midpoint
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The midpoint M of PQ is the point between P and Q such that PM = MQ.
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Midpoint Formula
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1. On a number line, the coordinate of the midpoint of a segment whose endpoints have coordinates a and b is (a+b)/2.
2. In a coordinate plane, the coordinates of the midpoints of a segment whose endpoints have coordinates (x1, y1) and (x2, y2) are ((x1 + x2)/2, (y1 + y2)/2). |
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What is the interior of an angle?
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What is the exterior of an angle?
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Angle Additon Postulate
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If R is in the interior of <PQS, then m<PQR + m<RQS = m<PQS.
If m<PQR + m<RQS = m<PQS, then R is in the interior of <PQS. |
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Definition of a right angle
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<A is a right angle if m<A is 90.
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Definition of an obtuse angle
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<A is an obtuse angle if m<A is greater than 90 and less than 180.
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Definition of an acute angle
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<A is an acute angle if m<A is less than 90.
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Perpendicular Lines are:
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special intersecting lines that form right angles.
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Vertical Angles:
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are congruent.
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