Answer:
In ∆ABD and ∆ACD
<BAD =<CAD ( each are half of <A )
<D=<D ( each equal to 90°)
AD = AD ( common)
So ∆ ABD is congruent to ∆ ACD.
Then AB =AC (by C.P.C.T)
Hence,∆ABC is an iso - sceles triangle.
<em>f(g(x)) = </em><em> ; g(f(x)) = 7x - 30</em>
Step-by-step explanation:
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Answer: 72°