a long, narrow mark or band.
angle: the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line.
acute angle: is an angle smaller than a right angle and it is less than 90
complementary angles:either of two angles whose sum is 90°.
corresponding angles: the angles that occupy the same relative position at each intersection
sector:an area or portion that is distinct from others.
diameter: a straight line passing from side to side through the center
area:a region or part of a town, a country, or the world.
polyhedron:is a solid in three dimensions with flat polygonal