Question

triangle abc is shown below.

It is rotated to result in A” B” C”. Which triangle contains enough information to prove that it could be the result of this transformation?
Answer choices in the picture.

Answer 1

C

Explanation:

it is still C, as the angle-angle-angle information of D is not enough. the sides could all grow or shrink (in the same relation, but still) and the angles would still be the same.

so, D is not enough (although we have 3 pieces of information, but this is the special case, where even that is not enough - we need at least one side in the mix).