In isosceles triangle RST with vertex angle S, 
. Describe the measure of 
.
Definitions:
Diels-Alder Reactions
A chemical reaction between a conjugated diene and a dienophile to form a cyclohexene derivative.
Cyclopentadiene
A cyclical diolefin molecule known for its unique reactivity, utilized in Diels-Alder reactions, and producing polymers and resins.
1,3-Butadiene
An organic chemical compound that is a colorless gas with a mild gasoline-like odor, used in the production of synthetic rubber and polymers.
Dienophile
A compound that is attracted to dienes, participating in Diels-Alder reactions to form cyclic compounds.
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