Chapter 16 Envisions Vocabulary
Terms in this set (38)
is an exact location in space
is a straight path of points that goes on and on in two directions
is an endless flat surface
two lines that never intersect
lines that pass through the same point
lines that form square corners (90 degree angles)
a part of a line with two endpoints
is a part of a line that has one endpoint and continues on forever in one direction
is a figured formed by two rays that have the same endpoints.
is an angle with a square 90 degree corner
is an angle that is open less than a right angle ( less than 90 degrees)
is an angle that is open more than a right angle (more than 90 degrees)
is an angle that forms a straight line
is an angle that cuts off 1/360 of a circle and measures 1 degree.
angles are measured in units called
the degrees of a certain angle
a tool that is used to measure and draw angles
is a closed flat shape or plane made up of line segments
each is a line segment
the point where two sides meet
a polygon with three sides
a polygon with four sides
a polygon with five sides
a polygon with six sides
a polygon with eight sides
a triangle with 3 equal sides
a triangle with 2 equal sides
a triangle with 0 equal sides
a triangle with one right angle.
is a triangle with three acute angles. All of its angles measure less than a right angle.
is a triangle with one obtuse angle. One angle has a measure greater than a right angle.
is a quadrilateral that has opposite sides that are parallel and all of its sides are the same length.
is a quadrilateral with only one pair of parallel sides.
has two pairs of parallel lines.
has 4 right angles. It is also a parallelogram.
has 4 right angles and all sides are the same length. It is a parallelogram, rectangle, and a rhombus.
if it can be folded on a line to form two equal halves that fit on top of each other.
line of symmetry
the fold line is called