Lines and Line Segments
Angles
Polygons
Triangles
Quadrilaterals
100
An exact position on a plane
What is a point?
100
an angle with exactly 90 degrees
What is a right angle?
100
a polygon with three sides
What is a triangle?
100
a triangle in which all sides are the same length
What is an equilateral triangle?
100
a quadrilateral that has four right angles and all sides are the same length
What is a square?
200
a set of points that is endless in both directions
What is a line?
200
an angle having less than 90 degrees
What is an acute angle?
200
a polygon with four sides
What is a quadrilateral?
200
a triangle in which ONLY TWO sides are the same length
What is an isosceles triangle?
200
a quadrilateral with four right angles and opposite sides are the same length
What is a rectangle?
300
part of a line that has two endpoints
What is a line segment?
300
an angle with more than 90 degrees but less than 180 degrees
This angle is an obtuse angle?
300
a polygon with five sides
What is a pentagon?
300
a triangle in which NONE of the sides are the same length
What is a scalene triangle?
300
a quadrilateral in which opposite sides are parallel and the same length
What is a parallelogram?
400
two lines that cross at one point
What are intersecting lines?
400
Lines, line segments, or rays that form right angles with each other
What is perpendicular?
400
a polygon with five sides
What is a hexagon?
400
a triangle that has an angle with a measurement of 90-degrees
What is a right triangle?
400
a quadrilateral in which opposite sides are parallel and ALL sides are the same length
What is a rhombus?
500
two lines that never cross
What are parallel lines?
500
the point where two rays meet to form an angle
What is a vertex?
500
a polygon with eight sides
What is an octagon?
500
a triangle in which all the angles are less than 90-degrees
What is an acute triangle?
500
a quadrilateral in which there is only one pair of parallel sides
What is a trapezoid?
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