MATH 206 Quiz Review
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An obtuse angle measures greater than 90 but less than 180
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The appropriate tool to measure the degree within angles is called a protractor
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Two lines that intersect to form right angles are called perpendicular
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A regular polygon has all sides equal in length and all angles equal in measure
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Two angles who sum is 90 are called commplentary angles
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Two lines that do not lie in the same plane are called skew
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A right-angle measure exactly 90
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Two angles whose sum is 180 are called supplementary angles
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An acute angle measure less than 90
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Two lines that lie in the same plane and never intersect are called parallel
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A ray extends from an endpoint indefinitely in one direction
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Points that lie on the same plane are called colinear
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Polygons are simple, closed curves with only segments as sides
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A segment has two endpoints and contains part of a line
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An angle is the union of two rays that share a common endpoint, called the vertex
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According to Euclid, the three undefined terms are point, line, and plane
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6 different types of triangles: right (one 90), acute (all<90), obtuse (one>90), equilateral
(all sides congruent), isosceles (at least 2 sides congruent), scalene (no sides congruent)
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Polygons according to the number of sides: triangle, quadrilateral, pentagon, hexagon,
heptagon, octagon, nonagon, decagon, dodecagon
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Degrees in a circle: 360
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Degrees in a straight line: 180
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Sum of interior angles of a triangle: 180 exterior:
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Sum of interior angles of a square: 360 exterior:
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Vertical angles are across from each other
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Know how to read a protractor
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Shapes!!!!!!!!!!!!
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Equal: =
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Not equal:
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Congruent:
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Parallel:
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Similar:
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Pi:
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Approximately:
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Perpendicular: