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35 terms

Corsa Chapter 4 Vocab

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acute angle
an angle with measure greater than 0 degrees and less than 90 degrees
acute triangle
a triangle in which all three angle measures are less than 90 degrees
area
the measure in square units of the interior region of a plane figure or the surface of a three dimensional figure
area of triangle
base times height and divide by two
base
a special side of a polygon used to compute area
composite figure
a shape made of several simpler figures
diagonal
a segment that joins two vertices of a polygon and is not one of the sides
division
inverse of multiplication
equilateral triangle
triangle with all three sides the same length
height
the perpendicular distance between two bases, or a vertex and a base
hexagon
a polygon with 6 sides
isosceles triangle
a triangle with at least two sides equal in length
line segment
a part of a line with endpoints
obtuse angle
an angle greater than 90 degrees and less than 180 degrees
octagon
a polygon with eight sides
parallel
two lines which never intersect and are the same distance apart
parallelogram
a quadrilateral with opposite sides parallel
pentagon
a polygon with five sides
perpendicular
lines, segments or rays that intersect to form right angles
polygon
a two dimensional closed figure with straight line segments connected end to end
quadrilateral
a polygon with four sides
ray
a portion of a line that has one endpoint and extends forever in one direction
rectangle
a quadrilateral with four right angles
regular polygon
a polygon with all sides congruent and all angles having the same measure
rhombus
a quadrilateral with four congruent sides
right angle
an angle with a measure of 90 degrees
right triangle
a triangle with one right angle in it
scalene triangle
a triangle with no two sides of equal length
square
a quadrilateral with four congruent sides and four rigth angles
square measure
units used to describe the measure of an area in the form of 1 * 1 unit squares
subproblems
a problem solving strategy which breaks problems into smaller parts which must be solved in order to solve the original problem
trapezoid
quadrilateral with exactly one pair of parallel sides
triangle
a polygon with three sides
vertex
the point at which two rays, line segments or lines meet.
vertical angles
angles opposite each other when two lines intersect.