Is it safe to use a bike helmet with rollerblades?

If i used my bicycle helmet with roller blades would it still be safe?
thank you mustaffa. Im going to start soon so i will be using a Helmet , Knee pads and Wrist pads. ( i don't think ill need elbow pads but i might get them incase).

I know how to ice skate a bit .. My friends said if you know how to skate on ice then learning how to rollerblade wont take very long for you to learn..so hopefully i do well ^ ^
 
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