Answer: Option C. (ST, TR, SR)
WORKINGS
Given,
m∠R = 37
m∠S = 50
m∠T = ?
m∠R + m∠S + m∠T = 180 (Sum
of angles in a triangle)
37 + 50 + m∠T = 180
87 + m∠T = 180
Subtract 87 from both sides of the equation
87 – 87 + m∠T = 180 – 87
m∠T = 93
Therefore the angles of the triangle, in order from smallest
to largest: ∠R, ∠S, ∠T
∠R is opposite ST
∠S is opposite TR
∠T is opposite SR
Therefore, the side lengths of the triangle in order from
shortest to longest: ST, TR, SR (Option C)
