Question

In
the Figure angle CDE = 40

a) find angle ADC
b) Find angle ABC
c) find angle AOC​

Answer 1

Answer:

ADC IS 140

ABC IS 40

AOC IS 80

Step-by-step explanation:

SINCE ADE IS A STRAIGHT LINE

SO ACD +40=180

SUM OF OPPOSITE ANGLES OF A CYCLIC QUADRILATERAL IS 180 SO ABC IS 40

ANGLE SUBTENDED BY AN ARC AT CENTRE IS DOUBLE THAT OF ANGLE SUBTEBDED BY SAME ARC AT A POINT ON CIRCLE so AOC IS 80

Answer 2

Answer:

angle of ABC =180-40 =140