Lines
Angles
Triangles
Polygons
Circles
100
a part of a line with two endpoints
What is a segment?
100
an angle that measures less than 90 degrees
What is an acute angle?
100
180 degrees
What is the sum of all the angles of a triangle?
100
a closed figure formed by all straight lines
What is a pentagon?
100
a segment that has both endpoints on a circle
What is a chord?
200
two lines on the same plane that never meet
What are parallel lines?
200
two angles that add up to 90 degrees
What are complementary angles?
200
a triangle with a 90 degree angle
What is a right triangle?
200
a segment that connects the center of the circle to the circle
What is a radius?
300
two lines that have exactly one point in common
What are intersecting lines?
300
two angles that add up to 180 degrees
What are supplementary angles?
300
a triangle with two congruent sides and angles
What is an isosceles triangle?
300
a polygon with all its sides and angles congruent
What is a regular polygon?
300
a segment that passes through the center of a circle with both endpoints on the circle
What is a diameter?
400
two lines that never intersect and that are not in the same plane
What are skew lines?
400
two angles that are next to each other, sharing a vertex and one side
What are adjacent angles?
400
a triangle with no congruent sides
What is a scalene triangle?
400
a polygon with two parallel sides
What is a trapezoid?
400
half a circle
What is a semi circle?
500
opposite angles formed by two intersecting lines
What are vertical angles?
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