If arc SQ = 84° and ∠RPS = 26°, what is the measure of arc RS?
if we assume that S is as tangent point, we can have the following formula:
(arcRS - arcSQ)/2 = ∠RPS= (arc RS - 84°) /2=26°
it means arc RS - 84° = 52°, and then meas arc RS = 52+84=136°
Answer:
\(arc\ RS=136\°\)
Step-by-step explanation:
see the attached figure to better understand the problem
we know that
The measurement of the external angle is the semi-difference of the arcs which comprises
In this problem
m∠RPS=\(26\°\) ------> external angle
so
m∠RPS=\(\frac{1}{2}(arc\ RS-arc\ SQ)\)
we have
m∠RPS=\(26\°\)
\(arc\ SQ=84\°\)
substitute the values
\(26\°=\frac{1}{2}(arc\ RS-84\°)\)
Solve for arc RS
\(52\°=(arc\ RS-84\°)\)
\(arc\ RS=52\°+84\°=136\°\)