fill in the blanks.

Question 11 Mark

If two non$-$parallel sides of a trapezium are equal then it is called $…………$

Answer

If two non$-$parallel sides of a trapezium are equal then it is called an isosceles trapezium.

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Question 21 Mark

A quadrilateral in which two pairs of adjacent sides are equal is called a $…………$

Answer

A quadrilateral in which two pairs of adjacent sides are equal is called a kite.

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Question 31 Mark

A quadrilateral in which one pair of opposite sides is parallel is called a $…………$

Answer

A quadrilateral in which one pair of opposite sides is parallel is called a trapezium.

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Question 41 Mark

The diagonal of a rhombus bisect each other at $…………$

Answer

The diagonal of a rhombus bisect each other at right angles.

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Question 51 Mark

It two adjacent sides of a rectangle are equal, then it is called a $…………$

Answer

It two adjacent sides of a rectangle are equal, then it is called a square.

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Question 61 Mark

If two adjacent sides of a parallelogram are equal, then it is called a $…………$

Answer

If two adjacent sides of a parallelogram are equal, then it is called a rhombus.

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Question 71 Mark

If an angle of a parallelogram is a right angle, then it is called a $…………$

Answer

If an angle of a parallelogram is a right angle, then it is called a rectangle.

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Question 81 Mark

The adjacent angles of a parallelogram are $…………$

Answer

The adjacent angles of a parallelogram are supplementary.

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Question 91 Mark

Sum of all interior angles of a $n-$sided polygon is $…………$

Answer

Sum of all interior angles of a $n-$ sided polygon is $(n – 2) \times 180^\circ$ or $(2n – 4) \times 90^\circ $.

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Question 101 Mark

Sum of all exterior angles of a polygon is $…………$

Answer

Sum of all exterior angles of a polygon is $360^\circ$ .

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Question 111 Mark

A polygon which has all its sides of equal length and all its angles of equal measure is called a $…………$

Answer

A polygon which has all its sides of equal length and all its angles of equal measure is called a regular polygon.

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Question 121 Mark

$10$ sided polygon is called $………..$

Answer

$10$ sided polygon is called decagon.

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Question 131 Mark

A polygon in which each interior angle is less than $180^\circ$ is called a $…………$

Answer

A polygon in which each interior angle is less than $180^\circ$ is called a convex polygon.

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Question 141 Mark

A simple closed curve made up entirely of line segments is called a $…………$

Answer

A simple closed curve made up entirely of line segments is called a polygon.

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Question 151 Mark

A curve which does not cross itself at any point is called a $…………$

Answer

A curve which does not cross itself at any point is called a simple curve.

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Question 161 Mark

The curves which have different beginning and end points are called $…………$

Answer

The curves which have different beginning and end points are called open curves.

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