The point (2.1.-3.5) is reflected over the x-axis, what is the coordinate of that point of reflection?

What is the least common multiple of 6 and 17?

With: label the vertices and all the elements needed. find x

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.