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100
an exact location in space named by a capital letter
What is a point
100
a straight path that extends forever in opposite directions
What is a line
100
a part of a line with two endpoints
What is a line segment
100
a flat surface that extends without end in all directions
What is a plane
100
part of a line with one endpoint that extends forever in one direction
What is a ray
200
two rays joined at a common endpoint called a vertex
What is an angle
200
the point on an angle
What is a vertex
200
lines or segments that meet or cross at one point
What is intersecting
200
lines or segments that meet or intersect to form right angles
What is perpendicular
200
lines or segments in a plane that stray the same distance apart and never meet or cross
What is parallel
300
lines that go side to side, back and forth
What is horizontal
300
lines that go up and down
What is vertical
300
lines that are neither parallel or perpendicular, they lie in different planes
What is skew
300
having the exact same measurement
What is congruent
300
an angle that is exactly 90 degrees
What is a right angle
400
an angle less than 90 degrees
What is acute
400
an angle greater than 90 but less than 180 degrees
What is obtuse
400
an angle that is exactly 180 degrees
What is straight
400
opposite angles formed by intersecting lines
What is vertical
400
two angles that share a common vertex, a common side and do not overlap
What is adjacent
500
two angles that sum is 90 degrees
What is complementary
500
two angles that sum is 180 degrees
What is supplementary
500
the complement of 40 degrees
What is 50 degrees
500
the supplement of 25 degrees
What is 155 degrees
500
how angles are measured
What is a degree
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