Solve the right triangle​ ABC, where C=90°.   a=77.7 ​yd, b=39.9 yd

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter11: Rational And Irrational Numbers
Section: Chapter Questions
Problem 7CR
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Question
Solve the right triangle​ ABC, where
C=90°.
 
a=77.7
​yd,
b=39.9
yd
 
 
 

 

Part 1
The length of c is
87.3
yd.
​(Simplify your answer. Type an integer or a decimal. Round to the nearest tenth as​ needed.)
Part 2
Angle
A=62.9°    77.8​'     (it is saying this is wrong, can you confirm??)
​(Simplify
your answers. Type an integer. Round to the nearest ten minutes as​ needed.)
 
Also, what would angle B =
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