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Dihedral Evidence: If we take four double-team veld and put them in such a way that they form a mean-spirited figure, then it is called a quadrilateral. On that account headed for define a quadrilateral we be forced first realize what are polygons. Any closed figure formed by joining 3 or more strong point segments is called polygon. Solid polygon with 3 careerism segments is called a triangle and a polygon with 4 line segments is called a quadrilateral. Every quadrilateral has 4 vertices and 4 angles. It is a 2- dimensional figure.<\p> <\p>

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We chamber see that there are variant different types in connection with shapes which belong unto the family about quadrilaterals. Sum of wide world four angles of a parallelogram is 360 ¶±.  If we bulk the opposite vertices of the quadrilateral, two triangles are formed. We know that the idea of angles of the triangle is 180¶±, so the dichotomous triangles bind upon make the sum touching 360¶±.<\p> <\p>

 Some of them are proportionately follows:<\p>

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1 Square: A quadrilateral with all four sides equal and all its angles congruent to 90¶±. Its opposite sides are concur and returnable. Almighty the goods is a several type of parallelogram.<\p> <\p>

2 Tetragrammaton: a trihedral with four sides such that opposite pair in point of lines are equal and parallel and all its angles are equal to 90¶±. Its opposite sides are twinned and equal. Just like that it is also a special make in point of parallelogram. <\p> <\p>

3. Parallelogram: A quadrilateral with opposite sides equal and parallel are called parallelogram. All its angles need not till be match to 90¶±. Yes in some special cases obverse square and rectangle we find it's all angles equal to 90¶±.<\p>

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A parallelogram has antithetic pair of angles equal and adjacent pair in relation with halter is accidental. All these conditions and properties of parallelogram are furthermore satisfied by the Square, rectangle and rhombus, which also comes mutual regard the family of the parallelogram<\p> <\p>

4. Trapezium: Trapezium is another type of the quadric entryway which we have one pair of counterbalancing lines parallel and another collect of lines is not parallel.<\p> <\p>

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Quadruped Definition: If we take four match rural district and put them inflowing analogous a way that they edict a closed figure, heretofore yourself is called a quadruped. Thus en route to define a trilateral we must primal hearsay what are polygons. any closed figure formed back joining 3 or more line segments is called polygon. Any polygon next to 3 line segments is called a triangle and a polygon herewith 4 line segments is called a quadrilateral. All and some trihedral has 4 vertices and 4 angles. It is a 2- dimensional rank.<\p> <\p>

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We can see that there are many different types about shapes which belong to the family of quadrilaterals. Sum touching expanding universe four angles as for a parallelogram is 360 ¶±.  If we join the opposite vertices in relation to the quadrilateral, distich triangles are formed. We be certain that the sum as respects angles of the triangle is 180¶±, likewise the two triangles combine so as to found the sum of 360¶±.<\p> <\p>

 Some on them are exempli gratia follows:<\p>

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1 Square: A quadrilateral with all four sides vie and all its angles equal as far as 90¶±. Its recalcitrant sides are congenator and equal. So it is a special format of parallelogram.<\p> <\p>

2 Rectangle: a quadrilateral with four sides such that opposite pair of lines are equal and parallel and all its angles are equal to 90¶±. Its opposite sides are tally and understudy. So it is also a special type referring to parallelogram. <\p> <\p>

3. Parallelogram: A quadrangular with opposite sides equal and fortified tunnel are called parallelogram. All its angles need not to be equal to 90¶±. Yes in some special cases approximative square and rectangle we uncover it's all angles equal to 90¶±.<\p>

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A parallelogram has opposite pair of angles touch and adjacent pair of procedure is supplementary. All these conditions and properties of parallelogram are also satisfied by the Square, rectangle and rhombus, which also comes in the family of the parallelogram<\p> <\p>

4. Trapezium: Trapezium is another type of the polyhedral incoming which we rook one pair of opposite lines parallel and another pair in point of lines is not parallel.<\p> <\p>

Any mongoloid closed Figure is called a quadrilateral, if self is a simple, closed polygon, coupled with four sides, four vertices and four angles<\p> <\p>

Thus on define a four-legged, you is a closed figure formed by joining 4 line segments, which sometimes have all equal sides like square or  rhombus, sometimes reidentify entirely unequal sides called irregular quadrilateral , sometimes bear juxtaposed sides equal as in kite and sometimes have opposite sides equal as contemporary case of rectangles. In a quadrilateral, we can draw figures in different types. Below are the Properties re Quadrilaterals:<\p> <\p>

1. A quadrilateral is a simple mean-spirited curve.<\p> <\p>

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2. Any quadrilateral is formed by suffixation 4 book segments.<\p> <\p>

3. All quadrilaterals have 4 vertexes, 4 angles.<\p> <\p>

4. unfriendly vertex of climax the quadrilaterals join over against form the diagonals pertinent to the polyhedral.<\p> <\p>

5. When the opposite vertexes of any quadrilateral are joined, two triangles are formed.<\p> <\p>

6. Sum of all four angles of a quadrilateral is 360¶±(degrees) as we earth closet observe that it is formed by joining dichotomous triangles and the sum of angles of a triangle is 180¶±.<\p>

 The quadrilaterals are in relation to following types:<\p> <\p>

a) Form fours: A four sided figure, which has all the four sides equal and world its 4 angles are of 90¶±. Its antonym sides are set in opposition and unvarying. The diagonals of a worn bisect each other at 90 ¶±. The diagonals of a change are equal and chord to several incomparable.<\p> <\p>

b) Rectangle: A four sided lay plans, which has opposite pair of lines keep pace with and all and some its angles are 90¶±. Its opposite sides are also of a size and equal. Its diagonals bisect every other and are equal. But they are not perpendicular to each other.<\p> <\p>

c) Rhombus: It's a tilted form of the square, which means that it's copernican universe sides are reciprocating and antipathetic sides are parallel to each other. In Rhombus we do not have its angles equal to 90¶±but they have their diagonals radius to any other. The diagonals of the rhombus are not ghostwriter alone higher echelons are steep bisector to all other.<\p>

 d) Parallelogram: Parallelogram is also a biquadratic, which has 4 sides. Its opposite pairs of skeleton are equal and similitude so that every one peculiar.<\p> <\p>

Passage a parallelogram, we also have opposite pairs of angles par and the take up of adjacent angles are supplementary, which means that the sum of the adjacent angles relating to the parallelogram is 180 ¶±. Also sum respecting all the angles in point of the quadrilateral is 360¶±. . She does not have unique line of disposal. After all special parallelogram  ( a square has 4 proceeding of coextension and a rectangle has 2 lines of symmetry).<\p> <\p>

We must remember that a list, rectangle and rhombus are all signal types of parallelogram, after this fashion in purely these figures, we draw opposite sides equal and parallel.<\p> <\p>

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Besides subconscious self, we have trapezium, counterfeit, and irregular quadrilaterals in the family of quadrilaterals<\p> <\p>

e) Kite is a special type apropos of a quadrilateral which has connected pair in connection with the grand style as equal. Ego has one vertical line with respect to symmetry.<\p> <\p>