5. Square
A four-sided two-dimensional figure
with four sides equal in length and
all angles right angles.
Its diagonals are perpendicular and
equal and they cut each other in a
middle point.
6. Rectangle
A four-sided two-dimensional figure
with opposite sides equal and all
its angles right angles.
Its diagonals cut each other in a
middle point and they don’t form a
right angle but an oblique angle.
7. Rhombus
A four-sided two-dimensional figure
with four sides equal in length and
with opposite angles equal.
Its diagonals are perpendicular and
they cut each other in a middle
point.
8. Rhomboid
A four-sided two-dimensional figure
with opposite sides equal in length
and opposite angles equal.
Its diagonals cut each other in a
middle point and form an oblique
angle.
9. Trapezium
A four-sided two-dimensional figure
which two parrallel sides and they
classify in:
• Rectangle trapezoid
• Isosceles trapezoid
• Scalene trapezoid
10. Rectangle trapezoid
A four-sided two-dimensional figure
which two parrallel sides and two
equal angles.
Ist diagonals are unequal, oblique
and they don’t cut each other in a
middle point.
11. Isosceles trapezoid
A four-sided two-dimensional figure
which two parrallel sides and
opposite angles equal.
Ist diagonals are equal, oblique and
they don’t cut each other in a
middle point.
12. Scalene trapezoid
A four-sided two-dimensional figure
which two parrallel sides and four
unequal angles.
Ist diagonals are unequal, oblique
and they don’t cut each other in a
middle point.
13. Trapezoid
A four-sided two-dimensional figure
with four different angles.
Ist diagonals are unequal, oblique
and they don’t cut each other in a
middle point.
