Let the length of the other parallel side be b.
Length of one parallel side (a) = 10 am and height (h) = 4 cm
Area of trapezium = 1/2 (a+b)xh
⇒ 34=1/2(10+b)x4 ⇒ 34 = (10+b)x2
⇒ 34=20+2b ⇒ 34-20=2b
⇒ 14=2b ⇒ 7=b ⇒ b=7
Hence, the another required parallel side is 7 cm.

Class 8 Maths Chapter 11 Exercise 11.2 Solution in Video

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