Given:  Concentric circles with center

Find:  a)

b)

Exercises 16, 17
a)
To find:
Given:
Concentric circles with centre Q with
Definition:
Segment addition postulate:
If X is a point on
Calculation:
Given that
Therefore
Hence
By segment addition postulate,
We have
From the figure, we see that QS and QV are radii of the outer circle
b)
To find:
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