December 2018 1 25 Report
Segi empat PQRS adalah bangun datar jajargenjang. Diketahui sudut P = (2x + 20)°, sudut Q = (x + 10)°, dan sudut S = 3y°. Tentukan
(a) nilai x dan y;
(b) besar ∠ R dan ∠S
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