User:Weux082690/Draft of List of common geometric figures
Appearance
The following is a list of the most commonly encountered shapes with pictures and names for each.
Triangles
[edit]A list of different types of triangles, all of which have three sides and three angles.
Name | Definition | Picture | Seen in |
---|---|---|---|
Equilateral triangle | Three equal sides and three equal angles. | ||
Isosceles triangle | Two equal sides and two equal angles. | ||
Right triangle | One angle is a right angle (90 degrees or pi/2 radians) | Building construction | |
Scalene triangle | Not equilateral or isosceles |
Quadrilaterals
[edit]A list of quadrilaterals, which have four sides and four angles.
Name | Definition | Picture | Seen in |
---|---|---|---|
Square | All four sides are equal length. All four angles are equal (90 degrees or pi/2 radians) | ||
Rectangle | All four angles are equal (90 degrees or pi/2 radians). Each pair of opposite sides are equal, i.e., if the sides are numbered clockwise: 1,2,3,4, then 1 & 3 would be equal and 2 & 4 would be equal. | Pieces of paper, doorways, most signs, etc. The most common shape in the modern world. |
Higher Polygons
[edit]Shapes with more sides than four.
Name | Definition | Picture | Seen in |
---|---|---|---|
Hexagon | Six sides and six angles | Pencil cross sections, honeycombs | |
Octagon | Eight sides and eight angles | Stop signs |
Curves
[edit]Shapes not made up of straight lines.
Name | Definition | Picture | Seen in |
---|---|---|---|
Circle | Perfectly round. All points same distance from center. | Coins, CDs, etc. | |
Oval |