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CPM Course 3 - Chapter 9
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Terms in this set (24)
AA Theorem for similarity (AA~)
if two angles of one triangle are congruent to the two corresponding angles of another triangle, then the triangles are similar
acute angle
an angle with a measure greater than 0 degrees (0º) and less than 90 degrees (90º)
adjacent angles
two angles that have a common side, a common vertex, and no interior points in common (next to each other)
alternate interior angles
angles between a pair of lines and on opposite sides of a third intersecting line (called a transversal)
complementary angles
two angles whose measures add up to 90 degrees (90º)
corresponding angles
angles on the same side of a pair of lines and on the same side of a third intersecting line (called a transversal)
exterior angles
the angle formed when a side of a triangle is extended to form an angle outside of the triangle
hypotenuse
the longest side of a right triangle (the side opposite the right angle)
legs (of a right triangle)
the two sides of a right triangle that form the right angle
obtuse angle
an angle with a measure between (but not including) 90 degrees (90º) and 180 degrees (180º)
parallel
two or more straight lines on a flat surface that do not intersect
perfect square
a number that is the product of an integer and itself (the square root is an integer)
perpendicular
two lines or segments that intersect to form a 90 degree (90˚) angle
Pythagorean Theorem
the sum of the squares of the legs of a right triangle is equal to the square of the hypotenuse (a^2 + b^2 = c^2)
radical sign
the symbol indicating the "square root"
remote interior angles
the two angles not adjacent to the exterior angle of a triangle...also known as "non-adjacent interior angles"
right angle
an angle that measures 90 degrees (90º)
square (a number)
to multiply it by itself, or raise it to the second power
square root
the number that can be multiplied by himself to get another given number
supplementary angles
two angles whose measures add up to 180 degrees (180º)
straight angle
an angle that measures 180 degrees (180º)
transversal line
a line that intersects two or more other lines on a 2D/flat surface
vertex
a point where two or more line segments or rays meet to form a "corner"
vertical angles
two non-adjacent (opposite) angles formed by two intersecting lines
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