You Do Need power plug adapter while traveling from Madagascar to Bermuda.

Here is Why You Need An Adapter

The outlet and plug type used in Bermuda are A and B and in Madagascar are C and E. This is how they look like.

Madagascar

In Madagascar, outlets of type C and E are in use.

Type C

Type E

Bermuda

In Bermuda, outlets of type A and B are in use.

Type A

Type B