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 lines
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
A triangle with one angle greater than 90 degrees
Obtuse triangle
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
Right, 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 shape with 10 equal sides is called
Decagon
A plane shape (two-dimensional) with straight sides. This is a closed figure with at least 3 sides.
Polygon
The sum of two angles add up to 90 degrees
Complimentary angles
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 Nonagon is a shape with
9 sides