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Angles & Triangles

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Across
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A part of a line that begins at a point and extends infinitely in one direction.
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An example that shows a statement is not true.
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An angle with sides that point in exactly opposite directions. (Measure 180 degrees.)
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A tool you use to create arcs and circles.
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The common endpoint the two rays of an angle share.
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Two adjacent angles with non-common sides that form a line.
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Geometric figures that have the same size, shape, and measure.
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The sum of the lengths of any two sides of a triangle is greater than the length of the third side.
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Two angles that share a common vertex and share a common side.
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A flat surface with an infinite length and width but no depth.
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A portion of a line that includes two points and all of the points between those points.
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A freehand drawing of an object.
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Special drawings using tools that do not have measurements.
Down
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An example that shows a statement is not true.
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Two nonadjacent angles formed by a pair of intersecting lines.
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Two rays that share a common endpoint.
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When the sum of two or more angles is 180 degrees.
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When the sum of two angles is equal to 90 degrees.
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When points lie on the same line or line segment.
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A location in space with no size or shape, but often represented as a dot.
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A ruler that has no numbers.
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When two lines, line segments, or rays intersect to form 90 degree angles.
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The points where a line segment ends.
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Part of a circle. The curve between two points on a circle.
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A straight continuous arrangement of an infinite number of points.