Mathematical Terminologies

• Area - the space occupied by a flat shape or the surface of an object
• Perimeter - continuous line forming the boundary of a closed geometric figure
• Volume - the amount which can be held, measured in cubic units
• Surface Area - sum of all area of a three-dimensional shape
• Circumference - the distance measured around a circle
• Acute - measures below 90 degrees
• Right - equal to 90 degrees
• Obtuse - larger than 90 but less than 180
• Straight - equal to 180
• Reflex - larger than 180 but less than 360 degrees
• Revolutionary - 360 degrees
• Complementary Angles - angles that add up to 90 degrees
• Supplementary Angles - angles that add up to 180 degrees
• Vertical Angles - Angles that are equal
• Line - a straight path of points that has no beginning or end
• Ray - contains one endpoint and extends forever in one direction
• Segment - a portion of a line that has two endpoints
• Intersecting lines - lines that come together to a point
• Perpendicular lines - two lines which intersect at right angles (90 degrees)
• Parallel lines - two or more lines that are the same distance apart and never meet
• Transversal lines - lines that cross two or more lines
• Adjacent angles - angles with a common side and vertex
• Alternate interior angles - two angles on different sides formed inside two parallel lines
• Corresponding angles - angles on the same side, one interior and one exterior, but not adjacent
• Equilateral triangle - triangle with three equal angles and three sides of the same length
• Isosceles triangle - triangle with two equal sides and two equal angles
• Scalene triangle - triangle with no equal side or angles
• Obtuse triangle - triangle with one obtuse angle
• Right triangle - triangle which contains one right angle
• Acute triangle - triangle which contains only acute angles, the interior angles are never more than 90 degrees
• Arc - set pf points that lie on a circle and are positioned within a circle
• Chord - a line that connects two points on a circle
• Radius - a line that lies from the center to the circle itself
• Diameter - a line that is in the circle which contains the center and has its endpoints on the circle
• Secant - a line passing through exact two points on a curve
• Tangent - a line that just touches and passes through a point on a curve
• Bisect - to divide into two equal sections
• Congruent - identical in shape and size
• Pi - a constant approximately equal to 3.14 used in determining a circle's circumference or area
• Vertex - the point of intersection between two or more rays, often called a corner