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sergey [27]
2 years ago
10

Can someone explain the process of how to do this ACT math?

Mathematics
1 answer:
hammer [34]2 years ago
3 0

Answer:

Step-by-step explanation:

∠D = ∠B     {opposite angles of parallelogram are equal}

∠D = 40°

In ΔDCA

∠DCA + ∠D + ∠CAD = 180   {Angle sum property of triangle}

57 + 40 + ∠CAD = 180

       97 + ∠CAD = 180

              ∠CAD= 180 - 97

∠CAD = 83°

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