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Sagot :

Answers:

m Arc OS = 68°

m Arc SK = 112°

m ∠OCS = 68°

m ∠SCK = 112°

m ∠OCD = 68°

m ∠DOK = 112°

m ∠DCS = 136°

m ∠ODS = 68°

m ∠ODK = 180°

m ∠ORS = 34°

m ∠OKD = 68°

Just remember that when a central angle has its same intercepted arc with other central angle then they are congruent.

Inscribed angle is 1/2 the measure of its intercepted arc.

Semicircle is equal to 180°.