Two lines that are the same distance apart and will never touch
What is parallel lines
An angle that measures exactly 90 degrees
Right angle
An triangle that only has acute angles
Acute triangle
This is the number of sides on a quadrilateral
4
A polygon with six sides
Hexagon
Lines that intersect to form a right angle
Perpendicular lines
An angle that measures between 0 and 90 degrees
Acute angle
A triangle with two acute angles and one angle measuring 90 degrees
Right triangle
A quadrilateral that has four right angles and all sides with the same length
What is a square
A polygon with five sides is called _________
Pentagon
This has one endpoint and one end that continues on forever
A ray
An angle that measures between 90 and 180 degrees
Obtuse angle
A triangle with one angle greater than 90 degrees
Obtuse triangle
A quadrilateral with two pairs of parallel sides
Parallelogram
If the length of a rectangle is 20 ft, and the width is 18 ft, what is the perimeter?
76 ft
A line segment that is three times as long as another segment that measures 18 feet
54 feet long
The number of degrees in a straight angle
180 degrees
How many sides do 9 triangles have altogether?
27 sides
A rectangle with a length of 15 cm and a width of 6 cm has a perimeter of ______
42 cm
This is a tool used to measure angles
Protractor
What kind of triangle is the one seen on the back of a dollar bill?
Acute triangle
This is a quadrilateral with only one pair of opposite sides parallel
Trapezoid
Length of square - 8 cm
Area of square - 64 sq. cm
What is the width?
8 cm