Write proof that proves triangle ABD is congruent to BAC, More info below.

sry for my bad english but, bcs it is a isosceles trapezoid diagonals and sides are the same so AC=BD, and AD=BC and angle DAB=ABC, hope you understood

answer: median

step-by-step explanation:

the median is the middle value when a data set is ordered from least to greatest

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc