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GEOMETRY FINAL 1 VOCAB REVIEW
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Gravity
Key Concepts:
Terms in this set (44)
Acute Angles
angles whose measure is >0 degrees and <90 degrees
Adjacent Angles
two coplanar angles that have a common side and a common vertex but no common interior points
Alternate Exterior Angles -
Angles that lie outside a pair of lines and on opposite sides of a transversal.
Alternate interior angles
angles between 2 lines and on opposite sides of a transversal
Angle Bisector
a ray that divides an angle into two congruent angles
Base angle of a triangle
either of the angles of a triangle that have one side in common with the base
Base of a Triangle
The side of a triangle which is perpendicular to the altitude.
Biconditional
the combination of a conditional statement and its converse, includes "if and only if"
Centroid
The point of concurrency of the medians of a triangle.
Collinear Points
points that lie on the same line
Complementary Angles
Two angles whose sum is 90 degrees
Conditional
An if-then statement; if p then q
Consecutive Interior Angles
interior angles that lie on the same side of the transversal, are supplementary
Contrapositive
If not q, then not p
Converse
the statement formed by exchanging the hypothesis and conclusion of a conditional statement, if q, then p.
Coplanar Figures
Figures in the same plane
Corresponding Angles
lie on the same side of the transversal and in corresponding positions
Counterexample
an example showing that a statement is false
Exterior angle of a Polygon
an angle formed by a side and an extension of an adjacent side
Hypotenuse
the side of a right triangle opposite the right angle
Hypothesis
The part that follows the "if" in a conditional statement.
Inverse
If not p, then not q
Leg of a Triangle
Either of the two shorter sides of a right triangle. These two sides together form the right angle in the right triangle.
Linear pair
A pair of adjacent angles whose noncommon sides are opposite rays.
Midsegment of a Trapezoid
a segment that connects the midpoints of the legs of a trapezoid
Midsegment of a Triangle
segment that connects the midpoints of two sides of a triangle
Negation
the opposite of the original statement
Obtuse Angle
An angle that measures more than 90 degrees but less than 180 degrees
Opposite Rays
two rays that have a common endpoint and form a line
Parallel Lines
lines in the same plane that never intersect
Point Slope Form
y-y₁=m(x-x₁)
Ray
One endpoint and all the points of the line on one side of the endpoint.
Regular Polygon
a polygon that is both equilateral and equiangular
Remote Interior Angles
the angles of a triangle that are not adjacent to a given exterior angle
Right Angle
an angle that measures 90 degrees
Scalene
A triangle with no congruent sides
Segment
A part of a line consisting of two endpoints and all points between them.
Segment Bisector
a line, ray, segment, or plane that divides a segment into two congruent segments
Slope
the steepness of a line on a graph, equal to its vertical change divided by its horizontal change
slope-intercept Form
y=mx+b
Straight Angle
an angle that measures 180 degrees
Supplementary Angles
two angles whose sum is 180.
Transversal Line
a line that intersects two or more lines
Vertical Angles
A pair of opposite congruent angles formed by intersecting lines
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