Geometry Cabinet Drawers
Drawer
I

Contains
six circles varying in diameter from ten to five cm

Drawer
II

Six
variations of rectangles: 10x10 cm square, 10x9, 10x8, 10x7, 10x6, 10x5

Drawer
III

Different
types of triangles: equilateral, rightangled isosceles, obtuseangled isosceles,
acuteangled isosceles, rightangled scalene, obtuse angled scalene

Drawer
IV

Different
regular polygons: pentagon, hexagon, heptagon, octagon, nonagon, decagon

Drawer
V

Four
curvilinear figures: ellipse, quatrefoil, curvilinear triangle, oval

Drawer
VI

Four
quadrilaterals: rhombus, right trapezoid, isosceles trapezoid, parallelogram

Geometry Cabinet Definitions
Circle

a
closed plane curve consisting of all points at a given distance from a point within
it called the center

Rectangle

a
parallelogram having four right angles

Square

a
rectangle having all four sides of equal length

Triangle

closed
plane figure having three sides and three angle

Equilateral

All
sides are of equal length; an equilateral triangle is also equiangular

Rightangled

Having
one right angle (90°)

Obtuseangled

Having
one angle of greater than 90°

Acuteangled

Having
angle of less than 90°

Scalene

Having
all sides unequal

Isosceles

Having
2 sides equal

Polygon

A
figure, usually closedplane, having three or more usually straight sides

Pentagon

A
polygon having 5 angles and 5 sides

Hexagon

A
polygon having 6 angles and 6 sides

Heptagon

A
polygon having 7 angles and 7 sides

Octagon

A
polygon having 8 angles and 8 sides

Nonagon

A
polygon having 9 angles and 9 sides

Decagon

A
polygon having 10 angles and 10 sides

Ellipse

a
plane curve such that the sums of the distances of each point in its
periphery from two fixed points, the foci, are equal; (x^{2}/a^{2})
+ (y^{2}/b^{2})=1; if a=b, the ellipse is a circle

Oval

having
the general form, shape or outline of an egg, wider at one end than the other

Quatrefoil

leaf
composed of four leaflets; a panellike ornament composed of four lobes
radiating from a common center

Curvilinear
triangle

triangle consisting
of or bound by curved lines

Rhombus

an
obliqueangled equilateral
parallelogram (any equilateral parallelogram except a square)

Parallelogram

quadrilateral
having both pairs of opposite sides parallel to each another

Trapezoid

a
quadrilateral plane figure having two parallel and two nonparallel sides

Right
trapezoid

trapezoid
with one right angle

Isosceles
trapezoid

trapezoid
with two sides of equal length

Geometry Cabinet Cards:
For each geometric shape in the Montessori geometry cabinet, there are 3 cards on which the shape/inset fits: a solidly filled in one, one with a thick outline and one with a thin outline.
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