∠AOD = ? ∠TES = 78° PET: TES = 2:3. PES=?

∠PET : ∠TES = 2 : 3
∠PET = $$\frac{2 \times ∠TES}{3}$$
∠PET = $$\frac{2 \times 78}{3} = 52$$
∠PES = ∠PET + ∠TES
∠PES = 52 + 78 = 130

Ответ: ∠PES = 130°