In Fig. 4.179, A B C and D B C are ...

In Fig. 4.179, ` A B C` and ` D B C` are on the same base `B C` . If `A D` and `B C` intersect at `O` , prove that `(A r e a\ ( A B C))/(A r e a\ ( D B C))=(A O)/(D O)` (FIGURE)

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