Question

let △abc≅△def. find m∠e. the value of m∠e is °. (simplify your answer. type an integer or a decimal.)

Explanation:

Answer:

Since \(\triangle ABC\cong\triangle DEF\), corresponding angles are equal. \(\angle E\) corresponds to \(\angle B\), so \(m\angle E=(78 + y)^{\circ}\) (assuming no further information to solve for \(y\)). If we had more information like equations from side - length equalities to solve for \(x\) and \(y\) we could get a numerical value. But with the given information as is, the answer in terms of the given variables is \(78 + y\)