5) TFRP, RPF-?, SFT-?

Дано: $$TF = RP$$, $$\angle TRF = 30^\circ$$. Найти: $$\angle RPF - ?, \angle SFT - ?$$ Решение: $$\angle RPF = \angle TRF = 30^\circ$$, т.к. $$TF = RP$$. $$\angle SFT = 180^\circ - \angle TRF = 180^\circ - 30^\circ = 150^\circ$$. Ответ: $$\angle RPF = 30^\circ, \angle SFT = 150^\circ$$.