POLYGONS
A polygon is a closed 2  dimensional shape made of straight lines with 3 or more sides. Triangles and rectangles are polygons.
TRIANGLES
Triangles are polygons as well. They are a closed shape with 3 or more sides. There are regular and irregular polygons.
> A triangle has three sides and three angles
> The three angles always add to 180 degrees
> There are three special names given to triangles that tell how many sides (or angles) are equal
There can be 3, 2 or no equal sides / angles:
> A triangle has three sides and three angles
> The three angles always add to 180 degrees
> There are three special names given to triangles that tell how many sides (or angles) are equal
There can be 3, 2 or no equal sides / angles:
WHAT TYPE OF ANGLE?
Triangles can also have names that tell you what type of angle is inside:
COMBINING THE NAMES:
Sometimes a triangle will have two names, for example:
RIGHT ISOSCELES TRIANGLE
> Has a right angle (90 degrees), and also two equal angles
Can you guess what the equal angles are?
Can you guess what the equal angles are?
IDENTIFYING TRIANGLES AND POLYGONS BASED ON THEIR ANGLES: >>>>>>>>> 
