Escribe las expresiones de perímetro y área de los siguientes rectángulos.
X + 7
X + 9
8
P =
PE
A =
A =​

Find the area of the regular hexagon if a side is 20 cm.

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.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)