Final answer:
There is insufficient information to determine the measure of LY.
Step-by-step explanation:
In this scenario, Lexi's stance that there isn't enough information to ascertain the measure of LY is correct. Ally's assertion of 117° lacks substantiation without additional data or context. To determine the measure of LY, supplementary details such as angles relationships, congruence, or supplementary information about the figure or problem are required. Without these specifics, providing a definitive angle measurement for LY is impossible.
Sometimes, a single angle measurement within a geometric figure can't be conclusively determined without a more comprehensive understanding of the figure's properties or other given angles. In this case, the absence of supplementary information prevents arriving at a precise angle measurement for LY, supporting Lexi's perspective.
In geometry, resolving unknown angles often necessitates leveraging known relationships or properties within a figure. As such, without further data or context, it remains inconclusive and impossible to validate Ally's proposed measure of 117° for LY.