October 2018 1 56 Report
Pada segitiga PQR diketahui sudut R =30° , pr = a cm, dan qr = 2a√3 cm. maka pq =.....cm
rumusnya bisa memakai pq^2 = qr^2 + pr^2 – 2qr kali pr kali cos R .
saya hanya bisa memberi rum,us, namun dalam perhitungan saya kesulitanm.
tolong dibantu ya kak?

thx.
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