Find the missing length. Round to the nearest tenth of necessary.

It is a right triangle with side a being 8 ft and side b being 21ft what is the length of the 3rd side?

A 441

B 22.5

C 64

D 19.4*

Am I right and please explain I am a little confused.

It is a right triangle with side a being 8 ft and side b being 21ft what is the length of the 3rd side?

A 441

B 22.5

C 64

D 19.4*

Am I right and please explain I am a little confused.

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