If the length of each of two equal sides...

If the length of each of two equal sides of an isosceles triangle is 10 cm. and the adjacent angle is `45^(@)`, then the area of the triangle is

A

`12 sqrt2 cm^2`

B

`15 sqrt2 cm^2`

C

`20 sqrt2 cm^2`

D

`25 sqrt2 cm^2`

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