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| Sandy Beach
Public School |
Ph:
(02)6656 17777 |
Visit
our Site |
Contact
Us |
| SPACE |
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|
Space 2D
|
looking at two dimensional shapes, looking
at plane shapes (i.e. ones that occupy a flat surface)
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Space 3D
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looking at three dimensional or solid shapes
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Line of Symmetry
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the line that divides a shape in half so
that each side is the mirrored image of the other.
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Net
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A flat shape that can be folded to make
a 3D shape e.g. the sheet of cardboard that folds to make
a carton.
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Tessellations
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identical shapes that fit snugly together
to form a pattern e.g. tiles on the bathroom floor or pavers.
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TRIANGLES |
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NAME
OF TRIANGLE
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PROPERTIES
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SHAPE
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Right angled triangle
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one angle - 90°
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Acute angled triangle
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all angles less than 90°
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Obtuse angled triangle
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one angle > 90° but
less than 180°
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Isosceles triangle
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2 sides equal
2 angles equal
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Equilateral triangle
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all sides equal
all angles 60°
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Scalene triangle
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no equal sides
no equal angles
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| 2D
SHAPES |
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Two-dimensional (2D) shapes - plane shapes are
two dimensional. They have length and width.
Polygon - a plane shape with three or more straight sides such
as a triangle, quadrilateral, a pentagon etc.
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| No.
of Sides |
Name |
Regular
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Irregular |
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3
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triangle
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 |
 |
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4
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quadrilateral
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5
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pentagon
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6
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hexagon
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7
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heptagon
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8
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octagon
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9
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nonagon
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10
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decagon
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