amelliadelloa65 amelliadelloa65
  • 02-04-2020
  • Mathematics
contestada

Helppppppppppp please

Helppppppppppp please class=

Respuesta :

DeanR
DeanR DeanR
  • 02-04-2020

Let's assume x is the arc measure of arc AC we're after.

Since CD is a diameter, it divides the circle in two, so the upper half arc is 180°.

Since we're parallel, arc AC is congruent to BD, so both measure x.

So for our semicircular arc we have

x + x + 80° = 180°

2x = 100°

x = 50°

Answer: 50°

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