Final answer:
Without additional context or information, it's impossible to provide the measure of <3 based on the measure of <5 being 63 degrees. Angle relationships such as complementary, supplementary, or interior angles within polygons would be needed for an accurate answer.
Step-by-step explanation:
The question posed seems to be about angle relationships and possibly involves the study of geometry, specifically the relationships between different angles in a shape or diagram. However, there isn't enough context provided to answer accurately how to find the measure of <3 given that the measure of <5 is 63 degrees. There are several different rules that relate angles to one another, such as complementary, supplementary, vertical angles, or angle relationships within polygons. Without more information about how <3 and <5 are related, we cannot determine the measure of <3.
Normally, if the angles are complementary, their measures add up to 90 degrees, and if they're supplementary, their measures add up to 180 degrees. If the angles form a linear pair (adjacent angles on a straight line), they are supplementary. If <3 and <5 are part of a polygon, you may need to know the number of sides of the polygon to find the sum of the interior angles and then solve for <3.