2. Types of Triangles This is a picture of a isosceles triangle. This a picture of a scalene triangle. It is also a right triangle. This is a picture of a equilateral triangle. It is also a acute triangle.
3. Types of angles This is a acute angle. This is a obtuse angle. This is a straight angle.
5. Types of Lines This is a perpendicular line. Also a intersecting line. This is a parallel line.
6. Types of movement This is a picture of a glide reflection. This is a picture of a transition.
7. Stuff in a circle This is a diagram. This is a picture of a central angle. Red is two radii. Black is a arc. In the middle of them two is the sector.