Acute Angle - An angle that is less than 90 degrees. , Line - Straight path that goes forever in two directions., Line Segments - Parts of lines with measureable lengths, Parallel Lines - Lines that never intersect and are coplanar. , Intersecting Lines - Lines that cross each other to form a point., Obtuse Angle - An angle that is more than 90 degrees. , Perpendicular Lines - Two lines that intersect to form right angles. , Point - An exact location in space. , Ray - A path that has a starting point but no end. , Right Angle - An angle that is exactly 90 degrees. , Angle - Two rays meeting at a common endpoint. , Opposite Rays - Two rays meeting at a common endpoint forming a 180º angle., Skew - Two lines that do not intersect and are non-coplanar., Intersecting Planes - Form a line where they intersect.,

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