1.

In the adjoining figure, ABICD and CLD. Prove thatAD=BCii) AC-BD少ーーームC

Answer»

angle AD is equal to angle bc due to parallel linesangle AC is equals to angle BD because adjacent pair

In ∆ ADC and ∆BCD , draw a perpendicular from A and D , so height will be equal.. because AB||CD so, diagonals AC = BC ,

now again in ∆ADC and ∆BCDDC is common , angle C = D, so diagonals are equal .so, ∆ADC ≈ ∆BCD ... ( SSA) there fore AD = BC



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