Please help:
question in photo:

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

The area of a circle is equal to 1 dm². find the radius of the circle.