The area of a regular hexagon is 40cm^2. what is the area of a regular hexagon with sides five times as long?

a 200cm^2
b 400cm^2
c 1,000cm^2
d 320 cm^2

can any one me on this whats the steps of doing this

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn.if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.