Polygons
Equilateral Triangle
All sides must be equal.
All internal angles must be congruent as well, they should all equal 60°.
Isosceles Triangle
2 internal angles are congruent and the other internal angle is different
An Isosceles Triangle must have 2 equal sides and 1 other side
Irregular Polygon
Regular Polygon
This polygon also has equal angles, these are the conditions for a regular polygon.
This polygon has equal sides.
Irregular polygons don't have equal sides.
Irregular polygons also don't have equal internal angles.
Quadrilateral
A quadrilateral can not intersect sides.
A quadrilateral has 4 sides.
Convex
A convex shape shape bulges outwards.
A non convex shape bulges inwards
Rhombus
2 angles are the same and the others are the same.
A rhombus is a square that has been ran over, the internal angles change.
Pentagon
The internal angles of a polygon add up to 540 degrees.
A regular five sided polygon.