Question

D, E and F are the mid-points of sides BC, CA and AB respectively of triangle ABC. Then triangle DEF is congruent to triangle

ABC
AEF
BFD, DCE
AFE, FBD, EDC​

Answer 1

Let ABC be the triangle and D, E and F be the mid-point of BC, CA and AB respectively. We have to show triangle formed DEF is an equilateral triangle. We know the line segment joining the mid-points of two sides of a triangle is half of the third side.