<C=180-93=87
<A=180-125=55
ingat seluruh jumlah sudut segitiga itu 180
<A+<B+<C=180
55+<B+87=180
142+<B=180
<B=180-142
<B=38 D
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<C=180-93=87
<A=180-125=55
ingat seluruh jumlah sudut segitiga itu 180
<A+<B+<C=180
55+<B+87=180
142+<B=180
<B=180-142
<B=38 D