Construct angle 160 ∘ using protractor and a ruler.

Draw a ray OA → using a ruler. Place the center of the protractor at point O so that the baseline of the protractor is on the ray OA → . Now the ray is a straight line measuring 160 ∘ , mark a point at 160 ° and name it as B. Join point B with O. Hence, ∠ BOA = 160 ∘ is the required angle. Since the angle measures is more than 90 ° , Therefore angle is an obtuse angle.

Construct angle 160 ∘ using protractor and a ruler.

Draw a ray OA → using a ruler. Place the center of the protractor at point O so that the baseline of the protractor is on the ray OA → . Now the ray is a straight line measuring 160 ∘ , mark a point at 160 ° and name it as B. Join point B with O. Hence, ∠ BOA = 160 ∘ is the required angle. Since the angle measures is more than 90 ° , Therefore angle is an obtuse angle.

Match the columns in the following. Column A Column B (a) Polygon with four sides (p) Side (b) Line segment joining the opposite vertices of a quadrilateral (q) Square (c) Line segment joining two consecutive vertices of a quadrilateral (r) Quadrilateral (d) Quadrilateral with all sides equal and all angles at right angles. (s) Diagonal

By definition of a quadrilateral, we know that, Quadrilateral is a polygon with four sides. By properties of quadrilateral, we know that, Line segment joining the opposite vertices of a quadrilateral is a diagonal. By properties of quadrilateral, we know that, Line segment joining two consecutive vertices of a quadrilateral is a side of a quadrilateral. By definition of a square, we know that, A quadrilateral means having 4 sides A quadrilateral with all sides equal and all angles at right angles is a square. Column A Column B (a) Polygon with four sides (r) Quadrilateral (b) Line segment joining the opposite vertices of a quadrilateral (s) Diagonal (c) Line segment joining two consecutive vertices of a quadrilateral (p) Side (d) Quadrilateral with all sides equal and all angles at right angles. (q) Square

E M B I B E

Mental Maths 5>Chapter 10 - Triangles and Quadrilaterals>Exercise-5>Q 2

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Construct angle $160^{\circ}$ using protractor and a ruler.

Important Questions on Triangles and Quadrilaterals

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5th CBSE

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Mental Maths 5>Chapter 10 - Triangles and Quadrilaterals>Exercise-6>Q 1

Write the number of quadrilaterals and their names of the figure given below.

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5th CBSE

IMPORTANT

Mental Maths 5>Chapter 10 - Triangles and Quadrilaterals>Exercise-6>Q 1

Write the number of quadrilaterals and their names of the figure given below.

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5th CBSE

IMPORTANT

Mental Maths 5>Chapter 10 - Triangles and Quadrilaterals>Exercise-6>Q 1

Write the number of quadrilaterals and their names of the figure given below.

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HARD

5th CBSE

IMPORTANT

Mental Maths 5>Chapter 10 - Triangles and Quadrilaterals>Exercise-6>Q 2

Match the columns in the following.

Column A	Column B
(a) Polygon with four sides	(p) Side
(b) Line segment joining the opposite vertices of a quadrilateral	(q) Square
(c) Line segment joining two consecutive vertices of a quadrilateral	(r) Quadrilateral
(d) Quadrilateral with all sides equal and all angles at right angles.	(s) Diagonal