Question

Va rog repede am nevoie pana la ora 17

Answer 1

Răspuns:

Explicație pas cu pas:

1)

arc AC=arc CD =arc DB= 180:3=60°

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arc AB=360:2=180°

arc AC=60°

arc AD= 60+60=120°

arc ABD=60+60=120°

arc BC=60°

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2)

∡AOC=60°

∡AOD=60+60=120°

∡BOD=60°

∡AOB=180°