Equilateral triangle.
Scalene triangle.
Isosceles triangle.
Right triangle.
Hexagon.
Octagon.
Decagon.
Pentagon.
Quadrilateral.
Pyramid.
Rectangle.
Parallelogram.
180 degrees.
90 degrees.
360 degrees.
270 degrees.
A line.
A ray.
A segment.
A vector.
Trapezoid.
A parallelogram.
Rhombus.
Kite.
A diameter.
A radius.
A chord.
A tangent.
An irregular polygon.
A regular polygon.
An ellipse.
A symmetric shape.
Acute triangle.
Obtuse triangle.
Scalene triangle.
Right triangle.
20 units.
5 units.
10 units.
15 units.