I need help on how to solve this so anything is good :)

STUV is a square

Step-by-step explanation:

segment length² = (x-x₁)² + (y-y₁)²

ST²: (-9 - 1)2 + (14 - 10)² = (-10)² + 4² = 116   (the rest follow this formula)

TU² = 116    TV² = 232    SU² = 232   SV² = 116   UV² = 116

ST = TU =SV = UV  (4 sides congruent)

TV = SU  (diagonal equal)

This is a square

Write it as a fraction then multiply by 100:-

= (50/67.4) *100 = 0.7418 * 100 = 74.2% ( to nearest tenth) < answer

Its D