Question

Please help for board exams please

Answer 1

Answer:

Step-by-step explanation:

In figure, O is a point in the interior of a triangle ABC, OD BC,

OE AC and OF AB. Show that:

(i) =  

(ii) =  

Ans. Join AO, BO and CO.

(i) In right s OFA, ODB and OEC, we have

, and

Adding all these, we get

=  

=  

(ii) In right s ODB and ODC, we have

and  

……….(1)

Similarly, we have ……….(2)

and = ……….(3)

Adding equations (1), (2) and (3), we get

=

=  

–= 0

=