Lines
Angles
Polygons
Triangles
Shapes
100
An endless number of points that go on forever in both directions. Has no beginning and no end.
What is a line?
100
The space in between two intersecting lines.
What is an angle?
100
Do all sides of a polygon have to be straight?
Yes
100
A triangle with 3 sides that are the same length.
What is an equilateral triangle?
100
A shape with four sides and four vertices.
What is a square?
200
Part of a line that has a beginning and an end.
What is a line segment?
200
The endpoint where two rays meet to form an angle.
What is a vertex?
200
Can a polygon be an open figure?
No
200
A triangle with two sides that are the same length.
What is an isosceles triangle?
200
A shape with 3 sides and 3 vertices.
What is a triangle?
300
Part of a line that has a beginning but no end.
What is a ray?
300
An angle that is 90 degrees.
What is a right angle?
300
Is a circle a polygon?
No
300
A triangle with no sides that are the same length.
What is a scalene triangle?
300
A shape with 5 sides and 5 vertices.
What is a pentagon?
400
Two lines that cross at one point. Only meet once.
What are intersecting lines?
400
An angle that is smaller than 90 degrees.
What is an acute angle?
400
The distance around the outside of a polygon.
What is perimeter?
400
A triangle that has three angles that are less than 90 degrees.
What is an acute triangle?
400
A shape with 6 sides and 6 vertices.
What is hexagon?
500
Two lines that go in the same direction but never meet.
What are parallel lines?
500
An angle that is larger that 90 degrees.
What is an obtuse angle?
500
The space inside a polygon.
What is the area?
500
A triangle that has one angle that is more than 90 degrees.
What is an obtuse triangle?
500
A shape with 8 sides and 8 vertices.
What is octagon?
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