You Do Need power plug adapter while traveling from Angola to Myanmar (Burma).

Here is Why You Need An Adapter

The outlet and plug type used in Myanmar (Burma) are A, C, D, G and I and in Angola is C. This is how they look like.

Angola

In Angola, outlets of type C are in use.

Type C

Myanmar (Burma)

In Myanmar (Burma), outlets of type A, C, D, G and I are in use.

Type A

Type C

Type D

Type G

Type I