mrpotato19
mrpotato19 mrpotato19
  • 12-01-2020
  • Mathematics
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MORE RSM HOMEWORK!!! HELP FAST PLEASE!!

MORE RSM HOMEWORK HELP FAST PLEASE class=

Respuesta :

skumari skumari
  • 19-01-2020

Answer:

x = 15°

Step-by-step explanation:

Here Δ EFD ≅ Δ EBC

therefore ∠ EDF = ∠ ECB

∵ ∠ EDF = 3 x

∴ ∠ ECB = 3 x

As we know that the sum of all angles of a triangle is 180° .

∠DAC + ∠ DCA + ∠ ADC = 180°

x + 3 x + 8 x = 180°

12 x =180°

x = 180°/12

x = 15°

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