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geometryclick to hear

Mathematical discipline that studies the relations between points, straight lines, curves, surfaces and volumes.
geometry obtuse angle acute angle right angle perpendicular is not parallel to is parallel to minute second pi degree

obtuse angle click to hear

Angle between 90° and 180°.

acute angle click to hear

Angle that is smaller than a right angle (less than 90°).

right angle click to hear

Angle formed by two lines or two perpendicular planes that measures 90°.

perpendicular click to hear

Symbol denoting that a straight line meets another at a right angle.

is not parallel to click to hear

Symbol denoting that two straight lines do not remain at a constant distance from one other.

is parallel to click to hear

Symbol denoting that two straight lines remain at a constant distance from one another.

minute click to hear

Symbol placed in superscript after a number that denotes degrees in sixtieths of a measure.

second click to hear

Symbol placed in superscript after a number that denotes degrees in sixtieths of a minute.

pi click to hear

Constant that represents the ratio of a circle’s circumference to its diameter; its value is approximately 3.1416.

degree click to hear

Symbol placed in superscript after a number to denote the opening of an angle or the length of an arc, or in front of an uppercase letter to identify a scale of measurement.