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NCERT Exemplar · Class 8 · Maths

Chapter 5: Understanding Quadrilaterals & Practical Geometry

Practice each question, then open the answer or worked solution.

Questions

99 questions
Q91Written answer

The polygon in which sum of all exterior angles is equal to the sum of interior angles is called __________.

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Worked solution

Solution:-

The polygon in which sum of all exterior angles is equal to the sum of interior angles is called Quadrilateral.

In questions 92 to 131 state whether the statements are true (T) or (F) false.

Q92Written answer

All angles of a trapezium are equal.

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Solution:-

False.

Because, all angles of a trapezium are not equal.

Q93Written answer

All squares are rectangles.

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Solution:-

True.

All squares are rectangles, because it has 4 right angles.

Q94Written answer

All kites are squares.

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Solution:-

False.

In kites all the angles are not equal to 90o but, in the square all angles are equal to 90o.

Q95Written answer

All rectangles are parallelograms

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Solution:-

True.

Because, all the properties of parallelogram are satisfied by the rectangle.

Q96Written answer

All rhombuses are squares.

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Solution:-

False.

Because, the angels of rhombus are not equal to 90o so all rhombuses are not squares.

Q97Written answer

Sum of all the angles of a quadrilateral is 180o.

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Solution:-

False.

Sum of all the angles of a quadrilateral is 360o.

Q98Written answer

A quadrilateral has two diagonals.

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Solution:-

True.

Q99Written answer

Triangle is a polygon whose sum of exterior angles is double the sum of interior angles.

True.

100. NCERT Exemplars Class 8 Maths Chapter 5 Image 27 is a polygon.

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Solution:-

False.

The given figure intersects with itself more than once.