Question

In the figure, O is the centre of the circle and AQ is the diameter.
AB=AC and AD=BC= 4 centimetres.
(a) What is the length of BD?
(b) IFOA is taken as r, then what is OD?
(c) Calculate the radius of the circle.
(d) What is the perimeter of the circle?
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Answer 1

Answer:

a)2 cm

b) 4-r cm

c) 2.5 cm

d) 5π or 15.71 cm

Step-by-step explanation:

all detailed steps are shown in the attached photos.

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