UPSC CDS Math Circle Questions

Remember:
The lengths of tangents drawn from an external point to a circle are equal.∴ AC = CE ....(1)
BD = DE ....(2)
PB = PA
=16 cm
∴ PA + PB = 32 cm
⇒(PC + AC) + (PD + BD) = 32cm
⇒ PC + (CE + DE) + PD = 32cm
[Using (1) and (2)]
⇒PC + CD + PD = 32 cm
Therefore, perimeter of ΔPCD = 32 cm