Definitions and Facts from the NSW Year 9 Measurement Topic
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Dimensions | The length, breadth and height of plane figures or solids
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| Two-dimensional | Flat, or having only two dimensions (length and breadth, but no height).
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| Perimeter | The distance around a shape, or the total length of a shape’s boundary.
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| Circumference | The perimeter of a circle.
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| Area | The amount of surface covered by an object.
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| Composite shape | A plane shape made up of simpler geometric shapes.
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| Perpendicular height | The height measured perpendicularly from the base to the vertex at the top. That is, creating an angle of 90 degrees with the base.
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| Capacity | The amount a container can hol
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| Volume | The amount of space taken up by an object or substance, measured in cubic units.
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| Net | A flat shape that can be folded up into a solid.
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| Prism | A 3D (three-dimensional) object with two facing ends or bases (polygons) that are the same size and the same shape (ie they are congruent). All its other faces are rectangular.
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| Radius | The distance from the centre of the circle to the circumference of the circle.
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| Diameter | An interval across a circle through the centre (twice the radius).
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