fozzzy wrote:

The longest straight line that can be inscribed in an isosceles triangle with area 10 and no obtuse angles is

A. less than 5

B. greater than or equal to 5, but less than 7.5

C. greater than or equal to 7.5, but less than 10

D. greater than or equal to 10, but less than 20.

E. greater than 20.

Let perpendicular = P

base = B

Now, 1/2 . B . P = 10

or, B . P = 20

Possibilities of the lengths B = 20 then P = 1

or, B = 200 And P = 1/10 Thus we can extract various values over 20 . So longest is more than 20 .

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Asif vai.....