Ini gimana yh gankasih tau dong?

Ini gimana yh gankasih tau dong?

Penjelasan dengan langkah-langkah:

$< r : = 180 - ( < s + < t) \ = 180 - (90 + 60) \ = 180 - 150 \ = 30$

$frac{ sin(30) }{6} = frac{ sin(90) }{rt} \ frac{ frac{1}{2} }{6} = frac{1}{rt} \ frac{1}{12} = frac{1}{rt} \ rt = 12$

$frac{ sin(30) }{6} = frac{ sin(60) }{rs} \ frac{1}{12} = frac{ frac{1}{2} sqrt{3} }{rs} \ rs = 6 sqrt{3}$

a. keliling segitiga

$keliling : = rs + st + rt \ = 6 sqrt{3} + 6 + 12 \ = 18 + 6 sqrt{3} cm$

$({ sin( < t) }^{2} + ( { sin( < r) }^{2} \ = ( { frac{1}{2} sqrt{3}) }^{2} + ( { frac{1}{2} )}^{2} \ = frac{3}{4} + frac{1}{4} \ = 1$