25. <APB = 70⁰( sudut pusat ), <ACB( sudut keliling ) = ( 2x + 3 )⁰
<APB = 2 × <ACB
70⁰ = 2( 2x + 3 )⁰
70⁰/2 = 2x + 3⁰
35⁰ = 2x + 3⁰
35⁰ - 3⁰ = 2x
32⁰ = 2x
x = 16⁰( c. )
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25. <APB = 70⁰( sudut pusat ), <ACB( sudut keliling ) = ( 2x + 3 )⁰
<APB = 2 × <ACB
70⁰ = 2( 2x + 3 )⁰
70⁰/2 = 2x + 3⁰
35⁰ = 2x + 3⁰
35⁰ - 3⁰ = 2x
32⁰ = 2x
x = 16⁰( c. )