If p =-2 ,q= -1 and r=3
find the value of . -
(1), p ²+ q²- r²

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Need on this geometry question. explain how you did it.

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.