What is the area of a semi-circle with a diameter of 14 units

Simply 8x squared + 5(7x squared- x) - 2x =

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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.