Angles
Polygons
Triangles
Quadrilaterals
Two Formulas
100
This is a benchmark angle that you can see when you look at a corner of a room.
What is a right angle?
100
This whether or not a polygon can have curved sides.
What is NO?
100
This is the sum of the interior angles of a triangle.
What is 180 degrees?
100
This is whether every square is a rectangle.
What is YES?
100
If you have a pentagon and you divide it into triangles with common vertices in the center, how many triangles would you get?
What is five?
200
This is a benchmark angle that you can use when something looks like it almost lies in a line.
What is a straight angle, or 180 degrees?
200
This is the word for the point where two sides meet in a polygon.
What is a vertex?
200
This is the way you can tell whether three given sides will make a triangle.
What is you add up the two shorter sides and see if the sum is larger than the longest side?
200
This is the kind of quadrilateral where both sets of opposite sides are parallel and have equal measures.
What is parallelogram?
200
If you divide a hexagon into triangles from one vertex, how many triangles would you get?
What is four? (Two less than the number of sides.)
300
This is the name for a line that crosses two parallel lines.
What is a transversal?
300
This is the pattern in the sum of the interior angles in polygons as you add on a side?
What is the sum goes up by 180 degrees?
300
This is whether two sides of a triangle will tell you enough information to make just one triangle.
What is no-- the third side can be many lengths?
300
This is a special kind of quadrilateral that has all equal sides.
What is a rhombus?
300
This is what "n" stands for in this formula that gives you the sum of the interior angles of any polygon.
What is the number of sides?
400
This is an angle that is next to a given angle in a quadrilateral. (They share sides.)
What is a consecutive angle?
400
This is the sum of the exterior angles of any polygon.
What is 360 degrees?
400
This is whether two sides and the angle between them will give you enough information to make one unique triangle.
What is yes -- you can just connect the ends of the two sides?
400
This is how you know whether any given sides will result in a quadrilateral.
What is add up the three shorter sides and see if their sum is greater than the longest side?
400
This is why you subtract 360 degrees from the 180 x 7 when you're trying to add up all the interior angles of a heptagon.
What is because the 7 triangles have angles that meet in the center that shouldn't be added into the sum of the interior angles?
500
When two lines cross, this is the word for the angles that are across from each other.
What are vertical angles?
500
This is one of the formulas for the sum of the interior angles in a polygon.
What is 180 x n - 360 or 180 x (n - 2)
500
This is why side-side-angle doesn't give you enough information to make a unique triangle.
What is it could result in two angles because the second side can rotate?
500
This is the sum of the interior angles of any quadrilateral?
What is 360 degrees?
500
This is what you can find with these two formulas (either one): 180 x n - 360 or 180 x (n - 2)
What is the sum of the interior angles of any polygon?
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