Show:
Basics 1
Basics 2
Angles/Triangles
4-Sided Polygons
Polygons
100

A position. Represented by a dot

What is a point?
100
When two lines cross
What is intersecting?
100
The angle that is exactly 90 degrees?
What is a right angle?
100
Any four-sided polygon
What is a quadrilateral?
100
Any figure that has all straight lines and is closed
What is a polygon?
200
Continues infinitely in one direction, and has one endpoint.
What is a ray?
200
Two lines that will never touch
What are parallel lines?
200
Any angle that is less than 90 degrees
What is acute?
200
A four-sided figure with 2 pairs of parallel lines, 4 equal sides, and 4 right angles.
What is a square?
200
A 5-sided polygon
What is a pentagon?
300
Continues infinitely in both directions
What is a line?
300
When two lines intersect and form a perfect right angle
What are perpendicular lines?
300
The name of a triangle that has one 90 degree angle.
What is a right triangle?
300
A four-sided figure with only 1 pair of parallel lines.
What is a trapezoid?
300
A 10-sided polygon
What is a decagon?
400
Has two finite endpoints
What is a line segment?
400
When two figures are the exact same size and shape
What is congruent?
400
Any angle that is greater than 90 degrees
What is an obtuse angle?
400
A four-sided figure with 4 equal sides, 2 pairs of parallel lines, and NO right angles
What is a rhombus?
400
A 9-sided polygon
What is a nonagon?
500
When two rays extend from the same vertex (end point)
What is an angle?
500
The line you can draw when one side of a figure is exactly the same as the other side.
What is a line of symmetry?
500
A triangle with sides that are all different lengths
What is scalene?
500
A four-sided figure with 2 pairs of parallel lines, 2 pairs of equal sides, and NO right angles.
What is a parallelogram?
500
A 7-sided polygon
What is a heptagon?