In ΔDEF, if DE ≅ DF and EF is the hypotenuse, then ΔDEF is a acute and scalene. c. right and isosceles.
b right and scalene. d. obtuse and isosceles.

C. Right and isosceles

Explanation:

Since two sides of the triangle are equal in length ( and ), this means that the triangle is an isosceles triangle. Since is the hypotenuse of this triangle, it also means that the triangle is a right-angle triangle (the hypotenuse refers to the longest side of a right triangle). Therefore, we can conclude that ΔDEF is right and isosceles.

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i can't solve unless i know what the line is

step-by-step explanation:

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