Question

ABCD is a quadrilateral inscribed in a circle with centre of angle ADC is equal to 130 degree and AD equal to DC calculator reflex angle AOC and find angle abc and find angle a aod
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Answer 1

Answer:

260°

Step-by-step explanation:

because the angle suntan in the centre of the circle is always double the angle which subten in the chord

Answer 2

Step-by-step explanation:

AS GIVEN IN QN AD=DC

SO, WE CAN SAY ANG.130=ANG C AND ANG A = ANG O

THEREFORE AODC= 130+130+X+X ( X IS THE ANG A AND O)

MEANS 260+2X = 360(INT. ANGLES OF QUADRILATERALS)

SO, 2X=360-260

2X=100

X=100/2

X=50 MEANS ANG.O. IS 50 DEGREE

NOW, ANGLE AT CENTRE IS ALWAYS DOUBLE OF ANGLE AT TOP

MEANS ANG.B = 50/2

THEREFORE ANG.B = 25 DEGREE

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