To find x, we'll need to proceed methodically. First, we'll start by finding the length of ST. The 30-60-90 relationship tells us that ST = 2. Then, we can find RT, also using the 30-60-90 relationship. RT = 4. Lastly, we can use the 45-45-90 relationship to determine that x = 4.
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first, you multiply both sides by 2; 77+x=168 then you subtract 77 from both sides; x=91 then you plug it back in to check; (77+91)/2=84 ; 168/2=84 ; 84=84
