1.Given that triangle ABC is congruent to triangle EDF,prove

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1.Given that triangle ABC is congruent to triangle EDF,prove that triangle DBG is isosceles.Use any format of proof that you prefer.(下面附图)
2.Sylvia has 14 coins,all nickels and quarters.If the value of the coins is $2.90,how many of each type of coin does she have?Explain your method.

1.假设三角形ABC全等于三角形EDF,证明三角形DBG是等腰三角形.使用任何你喜欢的方式证明,（下面附图）
2.西尔维娅有14个硬币,全是5每分和25美分的.如果硬币的价值是2.90美元,每一种硬币各有多少?解释你的方法.

1.Given that triangle ABC is congruent to triangle EDF,prove triangle what is bermuda triangle? In the figure above,equilateral triangle ABC is inscribed in Multiple-Choice:Given that a triangle with vertices A(2,1),B Given in the△ABC,a,b,c are three sides of the triangle,and 3 Triangle是什么意思? Given 2 sides of a right triangle,calculate: a____with three sides is a triangle. 请翻译As shown in the following diagram,there is a triangle ABC 英语翻译R is the set of all points within the triangle ABC which Right triangle PQR is to be constructed in the xy-plane so t