Angles in polygons
- Lizzie Robson
What do you notice about the triangles angles above? Move the triangle around, do the angles change?
What do the angles in a square add up to make? Hint: you can add them up if you are unsure
Notice the square above can be split into 2 triangles. What do the angles inside a triangle add up to make?
This time you have only been given one angle inside the pentagon. Like the shapes above it is regular which means all the angles are the same size. What does this mean the angles inside total?
The angle inside a shape is called the interior angle. For all the polygons above, when you move the points do the interior angles of the shape change?
Can you work out the exterior angles of the shapes above?
What is the exterior angle of the yellow shape? Can you name this shape?
What is the exterior angle of the red shape? Can you name this shape?
What is the exterior angle of the blue shape? Can you name this shape?