Question

Isosceles triangle RST is inscribed in circle P. The measure of arc RT is 130°. What is the measure, in degrees, of ZSRT ?PLEASE HELP!!!!!

Answer 1

We have an isosceles triangle therefore

arc RT = arc RS =130°

In a circle we have 360°, so we can find arc ST with the next equation

arc ST= 360-130-130=100°

Then in order to find the m

`\begin{gathered} m<\text{SRT}=(1)/(2)ST \\ m<\text{SRT}=(1)/(2)(100) \\ m<\text{SRT}=50\text{ \degree} \end{gathered}`