Download - Geometry
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DONE BYDONE BYSADIA SADIA
ZAREENZAREEN
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POINTA position in space, has no size only
location
•D •B •N
D, B and N represent points
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LINEContinues without end in opposite
directions
• • A B
AB represents a line
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PLANE
A flat surface that extends in four directions
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SEGMENT Part of a line made up of 2 points
and all the points of the line between the 2 points
• •D E
DE represents a segment
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RAY Part of a line consisting of one
endpoint and all the points of the line on one side of the endpoint
F G
FG represents a ray
• •
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A simple closed figures by joining three or more line segments is called polygon
POLYGON
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It is a closed figure formed by joining three line segments . So , a triangle is a polygon .
The three line segments which form the triangle are called its sides .
TRIANGLE
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A closed curve formed in such a way that any point on this curve is equidistant from a fixed point which is in the interior of the curve.
CIRCLE
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It is a closed figure formed by joining four line segments called quadrilateral. So quadrilateral is a polygon. Different shapes of quadrilateral are shown below:
The four line segments which form a quadrilateral are called its sides.
QUADRILATERAL
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A parallelogram is a quadrilateral with opposite sides parallel (and therefore opposite angles equal). A quadrilateral with equal sides is called a rhombus, and a parallelogram whose angles are all right angles is called a rectangle. And, since a square is a degenerate case of a rectangle, both squares and rectangles are special types of parallelograms.
PARALLELOGRAM
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RECTANGLE
The rectangle, like the square, is one of the most commonly known quadrilaterals. It is defined as having all four interior angles 90° (right angles).
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SQUAREThe square is probably the best known of
the quadrilaterals. It is defined as having all sides equal, and its interior angles all right angles (90°). From this it follows that the opposite sides are also parallel.
• A square is simply a specific case of a regular polygon, in this case with 4 sides. All the facts and properties described for regular polygons apply to a square.
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RHOMBUS
A rhombus is actually just a special type of parallelogram. Recall that in a parallelogram each pair of opposite sides are equal in length. With a rhombus, all four sides are the same length. It therefore has all the properties of a parallelogram.
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TRAPEZIUM
A trapezium is defined by the properties it does not have. It has no parallel sides. Any quadrilateral drawn at random would probably be a trapezium. Since it has no interesting properties beyond those of a quadrilateral, it is not used much in geometry.
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KITE A kite is a member of
the quadrilateral family, and while easy to understand visually, is a little tricky to define in precise mathematical terms. It has two pairs of equal sides. Each pair must be adjacent sides
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