Find the missing length. Round to the nearest tenth of necessary. It is a right triangle

QuestionsCategory: MathFind the missing length. Round to the nearest tenth of necessary. It is a right triangle
Nikole Mccray asked 6 months ago
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.

Do NOT follow this link or you will be banned from the site!