Usman458
Usman458 Usman458
  • 03-02-2019
  • Mathematics
contestada

question 8 circle theorems PLEASE

question 8 circle theorems PLEASE class=

Respuesta :

mathecoach
mathecoach mathecoach
  • 03-02-2019

Answer:

Opposite angles of a cyclic quadrilateral add to 180°

Angel CBA and angle ADC adds up to 180°.

CBA + ADC = 180

CBA = 180 - ADC


x + CBA = 180

x + 180 - ADC = 180

x - ADC = 0

x = ADC


y + ADC = 180

y + x = 180


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