if triangle rst is an acute triangle, then m∠s must be\nless than 90°.\nequal to 90°.\nequal to…
if triangle rst is an acute triangle, then m∠s must be\nless than 90°.\nequal to 90°.\nequal to 100°.\ngreater than 90° and less than 180°.
Answer
Explanation:
Step1: Recall acute - triangle definition
An acute - triangle has all angles less than 90°.
Step2: Analyze angle S
Since △RST is an acute - triangle, each of its angles (∠R, ∠S, and ∠T) must be less than 90°. So, m∠S must be less than 90°.
Answer:
less than 90°.