Below there is a diagram of two triangles describe a sequence of Rigid motions the map triangle ABC to triangle DEF how do Reagan motions apply to the idea of triangle congruence explain why corresponding sides and angles of these triangle are congruent

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)