The drawing on the site is not to scale. This one is:Extend TP to U ∠TPQ = ∠UPR because they are vertical angles. ∠TPQ = ∠SPR = ∠UPR PR bisects ∠UPS ΔSUP is a right triangle ∠UPS is complementary to ∠USP = 41o ∠UPS = 90o - 41o = 49o ∠RPS is half of ∠UPS, and half of 49o is 24.5o We now know two angles of ΔSRP, 24.5o and 41o, So we add them and subtract from 180o. ∠SRP = 180o-(24.5o+41o) = 114.5o Edwin