1.

BC = 30 cm. in given figure. Calculate the area of ∆ABC.

Answer»

In ∆ ABD,

∵ ∠BAD = ∠ABD

∴BD = AD ….(1)

In ∆ ADC,

∵ ∠DAC = ∠DCA

∴ DC = AD

From (1) and (2)

BD = DC = AD

⇒ AD = 1/2 BC = 1/2 x 30 = 15 cm.

∴ Area of ∆ABC = 1/2 x Base x Height

= 1/2 x BC x AD

= 1/2 x 30 x 15

= 225 cm2



Discussion

No Comment Found