BC: Decagon The number of side and vertices is 10.Total angle sum is 1440 degrees. | This decagon is congruent it also has 10 sides it also has 10 vertex. | This is an irregular decagon, it is not congruent, and it has carve line
FC: Shapes & Design By: Prayunk
1: Triangle- a triangle has only 3 sides 3 vertex, & total angle is 180 | The twin building has has an triangular sides, also it is congruent. | This triangle has no equal sides, the angles are different sides.This name is an scalene triangle.
2: A Quadrilateral has 4 side, they are congruent | total angle side is 360. | This drawing of an non-square rhombus & non- square rectangle, it not congruent, the shape and sides is not the same.
3: Hexagon- a hexagon has 6 sides and six angles and it is congruent, some of them can be irregular hexagon. | This color hexagon has 6 side, and 6 total angle. | Total angle sum is 720 degrees | This golden hexagon diamond is an irregular hexagon because it is not congruent
4: Pentagon- a pentagon has 5 sides, it 5 angles, and it is congruent. | This pentagon was in 2012 budget in Washington, D.C. | This is an irregular pentagon that is not congruent | total angle sum is 540 degrees.
5: Octagon The Number of side and vertices are 8. Total angle sum is 1080 degrees. | This pool clock is 10 sides, 10 vertex, and it congruent | This is example of irregular decagon, in sketch.