Q. 1 H5.0( 1 Vote )

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Answer :

Given. PQRS is a trapezium.

PQ = 4.5 cm, QR = 2.5 cm, RS = 3 cm and SP = 2 cm


Formula used. Area of trapezium = × height × sum of parallel sides


Area of trapezium = × height × (PQ + SR)


Steps of Construction


Step 1 : Draw a line PQ of 4.5cm


Step 2 : Mark a point E on PQ such that PE = 3cm and EQ = 1.5cm



Step 3 : Make arc of 2.5cm from point Q and 2cm from point E



Step 4 : Mark the intersecting point of both arcs to be R and join RE and EQ.



Step 5 : Draw arcs of 3cm and 2cm from point R and P respectively



Step 6 : Mark the intersection point of both arcs as S,join SP and RS



Step 8 : Draw a perpendicular on PQ from point R and name the intersection point as E



Area of trapezium = × height × (PQ + SR)


= × RE × (PQ + SR)


= × 2cm × (4.5cm + 3cm)


= 7.5cm2


Conclusion. Hence; Trapezium PQRS is constructed and its area is


7.5cm2


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