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 Related Terms
 Oblique:  A three dimensional figure that appears slanted. Also, a triangle that is not a right triangle (i.e., acute or obtuse).
Acute Triangle: A triangle with three acute angles.
Obtuse Triangle: A triangle with one obtuse angle.
Right Angle: An angle that measures exactly 90 degrees.
Right Triangle: A triangle with exactly one right angle.
Cone: A three dimensional figure with a circular or elliptical base and one vertex.
Cylinder: A three dimensional object with two parallel, congruent, circular bases.