Question

Answer as you can...​

Answer 1

Answer:

CD=2.1cm

Step-by-step explanation:

AC=CD____(1) & CB=CD_____(2)

Add (1) & (2),

AC+CB=CD+CD

AB=2CD

4.2=2CD

2.1cm=CD

Answer 2

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In the first circle, we can say that AD and CD are two tangents drawn from an outside point D .

This implies: AD=DC

DC=4 cm = AD ...(1)

Similarly, for tge second circle , two tangents are DB and DC.

DC=DB= 4cm ....(2)

Now AB = AD+DB

By (1) & (2)

AB =8 cm

Hope this helps!