Q1 of 65 Page 128

In Fig. 6.17, (i) and (ii), DE || BC. Find EC in (i) and AD in (ii)

(i) Let us take EC = x cm

Given: DE || BC


Now, using basic proportionality theorem, we get:


=



x =


x = 2 cm


Hence, EC = 2 cm


(ii) Let us take AD = x cm


Given: DE || BC


Now, using basic proportionality theorem, we get




x =


Hence, AD = 2.4 cm


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Give two different examples of pair of

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(ii) Non-similar figures

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State whether the following quadrilaterals are similar or not:

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E and F are points on the sides PQ and PR respectively of a Δ PQR. For each of the following cases, state whether EF || QR :

(i) PE = 3.9 cm, EQ = 3 cm, PF = 3.6 cm and FR = 2.4 cm


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(iii) PQ = 1.28 cm, PR = 2.56 cm, PE = 0.18 cm and PF = 0.36 cm

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