Can a chord also be classified as a radius?

No

Step-by-step explanation: A chord has 2 endpoints on the edge of the circle and a radius only has 1. A chord could be a diameter but a chord can't be a radius because a chord has to have both endpoints on the circle. Like I said before, a radius only has 1.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: