Question

If PQ and PR are two tangents drawn from an external point P to a circle and PQ=10cm, What is the length of PR? *​

Answer 1

Answer:

From the graph, we find some conclusion-

PA=PB=10cm

CE=CA

DE=DB

Perimeter of ΔPCD is,

=PC+PD+CD

⇒PC+PD+CE+ED

⇒PC+PD+CA+DB

⇒(PC+CA)(PD+DB)

⇒PA+PB

⇒10+10

⇒20 cm.

solution

Step-by-step explanation: