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Elodia [21]
3 years ago
8

Can you help me answer both questions please for number 5

Mathematics
1 answer:
storchak [24]3 years ago
4 0

Answer: A

<u>Step-by-step explanation:</u>

CD bisects ∠BCD and ∠ACD, so

∠BCD = ∠ACD

5x - 20 = 3x - 2

<u>-3x +20</u>   <u>-3x + 20</u>

2x         =        18

<u>÷2         </u>     <u>     ÷2  </u>

         x  =  9

∠BCD = 5x - 20  = 5(9) - 20  = 45 - 20  = 25


∠BCD + ∠CDB + ∠DBC = 180°

   25   +    90    + ∠DBC = 180°

         115           + ∠DBC = 180°

       <u> -115                         </u>   <u>-115 </u>

                            ∠DBC =  65°

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