A( an example of a secondary storage device.

A Compact Disk (CD), and Digital Versatile Disk (DVD), a floppy disk (if they still exist), a flash disk, and even a portable hard drive are all secondary storage devices. 

A USB is used to connect media devices to a PC
a SD card is used to store information on an external device

So an SD card is an secondary storage device

Ture hoped this

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.