area and multiplication
Terms
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- equilateral triangle
- a triangle with all side lengths equal
- right triangle
- a triangle in which one angle is a right angle (measures 90 degrees)
- obtuse triangle
- a triangle with an obtuse angle (greater than 90 degrees)
- parallel lines
- two straight lines on a two-dimensional plane that do not intersect nomatter how far they are extended
- quadrilateral
- a polygon with four sides
- obtuse angle
- an angle with measure greater then 90° and less then 180°
- hexagon
- a polygon with 6 sides
- diagonal
- a line segemt that connects two vertices of a polygon and is not a side
- base
- a special side os a polygon used to compute area
- octagon
- a polygon with 8 sides
- scalene trinagle
- a triangle with no equal sides
- rectangle
- a quaddrilateral with four right (90°) angles
- regular polygon
- a polygon in which all side lengths are equal and all angle measures are equal
- rhombus
- a quadrilateral with all four sides of equal lengths
- vertical angles
- the opposite angles where two lines meet
- paralellogram
- a quadrilateral with both pairs of opposite sides paralell
- height
- in a triangle paralellogram or trapeziod the perpendicular distance from a vertex to the line containing the opposite side (possibly extended)
- acute triangle
- a triangle in which all three angle measures are less then 90 degrees
- right angle
- an angle that measures 90°
- circle
- a set of points at a fixed distance (radius) from a point (center).
- vertex
- the point where two consecutive sides of a polygon meet
- line segment
- the part of a line between two points.
- polygon
- a two dimensional closed figues of straight line segments (called edges or sides) connected to the end
- ray
- part of a line starts at a point on the line and contains all.
- square
- a special rectangle with all sides of equal length
- pentagon
- a polygon with 5 sides
- isosceles triangle
- a triangle with two or more sides of egual length
- trapezoid
- a quadrilateral with one pair of parallel sides
- acute angle
- an angle with the measure greater then 0°and less than 90 °
- perpendicaular lines
- two lines on a flat surface which make a right angle when they meet