Math (Terms)

• Area is the space occupied by a flat shape or surface of an object
• Perimeter is a continuous line forming the boundary of a closed geometric figure
• The perimeter of a rectangle can be calculated using the formula P = 2l + 2w.
• An equilateral triangle has all its sides equal in length.
• A polygon is a plane figure with straight sides, usually bounded by three or more sides that meet at vertices.
• To find the perimeter of a square, add up all its sides.
• volume is the amount which can be held, as measured in cubic units
• surface area is the sum of a 3-dimensional shape
• circumference is the distance measured around a circle
• radius is the distance from the center to any point on the edge of a circle
• diameter is the distance across a circle through the centre
• acute angle measures below 90 degrees
• right angle measures equal to 90 degrees
• obtuse angle measures larger than 90 but less than 180
• straight angle measures equal to 180 degrees
• complementary angles are angles that add up to 90 degrees
• supplementary angles are angles that add up to 180 degrees
• vertical angles are angles that are equal
• adjacent angles are angles with a common side and vertex
• 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 at a point
• perpendicular lines - two lines which intersect at right angles
• parallel lines - two or more lines that are the same distance apart and never meet
• transversal line - lines that crosses two or more lines
• alternate interior angles are two angles on different sides formed inside two parallel lines
• alternate exterior angles are two angles on different sides formed outside two parallel lines
• corresponding angles - are angles on the same side, one interior, and one exterior, but not adjacent
• the sum of the measures of all angles of any triangle is 180 degrees
• equilateral triangle has three equal angles and three sides of the same length
• isosceles triangle has two equal sides and two equal angles
• scalene triangle has no equal sides or angles
• acute triangle contains only acute angles, the interior angles are never more than 90 degrees
• obtuse triangle contains one obtuse angle
• right triangle contains a right angle
• exterior angle is equal to the sum of the two remote interior angles of a triangle
• arc - set of 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