Question

For an external point P tangent PA and PB drawn to the centre of the circle O and radius 8cm if Op is
10 cm . find the length 7PA​

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.