matthewbarnwell18 matthewbarnwell18

02-01-2022
Mathematics

contestada

Determine the measure of ∠DFB.

1)

67°

2)

136°

3)

69°

4)

68°

Determine the measure of DFB 1 67 2 136 3 69 4 68 class=

Respuesta :

jcherry99 jcherry99

02-01-2022

Answer:

Step-by-step explanation:

The arc defining one part of the circle + the arc vertically opposite the given arc when added must be divided by 2. That's the value of angle at the intersection.

In this case, (arc BD + arcEC)/2 = < EFC

Arc bd = 69

Arc CE = 67

<EFC = (69 + 67)/2 = 68

So the answer is number 4

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