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Angles whose measures add up to 90 degrees. This picture has three angles which are 30 degrees each.

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A line segment is a line with two endpoints. In this triangle, there is three line segments.

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Angles (rays) who have a common vertex. In this picture, home plate is the vertex.

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Segments who measure the same and are the same segment or shape. In this picture the fence have the same shape and length.

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An obtuse angle is an angle which measure is bigger than 90 degrees but does not go higher than 180 degrees. The perimeter of the web is the obtuse angle.

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Lines that will never intersect and go on forever.

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An acute angle is an angle that measures under 90 degrees.

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A line is a straight angle that will go forever. The foul line is the line.

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The outside of an object, the green line is the perimeter.

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A circle is a shape that has no congruent lines and has a center point and a circumference.

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A triangle contains three congruent lines that equal the same measurement.

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Angle whose measure is 90 degrees.

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Sides are opposite rays, and the angle forms a "X."

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Angle which is a line and is equal to 180 degrees. In the picture, the half court line is the straight angle.

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An angle whose measures add up to 180 degrees. The picture shows 90 + 90 degrees which equals 180.

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Has four right angles, and also has two pairs of congruent lines.

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A square contains four right angles and has four congruent lines.

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The red represents a point. A point is a circle.