Lines and segment
This is a part of a line that has a starting point but no end point.
A ray
An angle less than 90 degrees.
acute angle
A four-sided polygon (or shape) is usually referred to as...
quadrilateral
True or false: An acute triangle can have more than one angle of less than 90 degrees.
true
This term describes a straight path that extends infinitely in both directions.
A line
An angle that measures exactly 90 degrees.
right angle
A trapezoid is different from other quadrilaterals because it has ...
one pair of parallel sides
This triangle has one angle that measures exactly 90 degrees.
right triangle
This is part of a line with two endpoints.
Line segment
An angle larger than 90 degrees but less than 180 degrees.
obtuse angle
A quadrilateral with four equal sides and four right angles.
square
A triangle with angles less than 90 degrees is named a...
acute triangle
These lines never meet.
parallel lines
An angle that measures exactly 180 degrees.
a straight angle
A quadrilateral with both pairs of opposite sides parallel and equal in length is known as what?
parallelogram
True or false: An obtuse triangle can have 2 angles of more than 90 degrees.
False
These lines meet or cross to form right angles.
perpendicular lines
What is formed when two rays meet at a common endpoint?
an angle
This quadrilateral has four equal sides but no right angles.
rhombus
A triangle with one obtuse angle is known as a ...
obtuse triangle