186k views
2 votes
Segments RT and SU are diameters of circle O.What is mSRT?

1 Answer

1 vote

Angle SRT is undetermined by the question.

A diameter always subtends a right angle (Thales' Theorem, the first in geometry) so we can be assured SRU, STU, RUT and RST are right angles.


User Drizzie
by
5.3k points