Lines
two lines that are the same distance apart and will never touch
parallel lines
This is the term for a 90 degree angle
right angle
A triangle that has all sides the same length
equilateral
This is the number of sides on a quadrilateral
4
A shape that has 6 sides is called
hexagon
lines that intersect to form a right angle
perpendicular
An angle that is less than 90 degrees
acute
A triangle with two sides the same length
isosceles
this is the number of degrees all angles of a quadrilateral will add up to
360 degrees
A shape with 5 sides is called
pentagon
this has one endpoint and continues in one direction forever
ray
an angle that is greater than 90 degrees
obtuse
This is a quadrilateral with two pairs of opposite sides parallel and 4 right angles
rectangle
A right triangle has one angle that is 45 degrees. What is the measure of the 3rd angle
45 degrees
This is part of a line
line segment
this is the number of degrees in a straight angle
180 degrees
A triangle with a 90 degree angle and no sides the same length
scalene
This is a quadrilateral with two pairs of opposite sides parallel and all sides the same length. (it does not have to have right angles)
rhombus
A quadrilateral has 3 angles measuring 90 degrees, 100 degrees, and 70 degrees. What is the measure of the 4th angle?
100 degrees
This is a closed figure with at least 3 sides.
a polygon
This is used to measure angles
protractor
All angles in every triangle will add up to this number of degrees
180 degrees
This is a quadrilateral with only one pair of opposite sides parallel
trapezoid
A boat has a sail with one pair of perpendicular lines, and two sides the same length. What kind of triangle is it?
Right, isosceles