Penyiku A sama dengan 2/11 kali pelurus A.besar A adalah
dimasrizqi11
Sdt A = x 90 - x = 2/11 (180-x) 11(90-x) = 360-2x 990 - 11x = 360-2x -11x+2x = 360-990 -9x = -630 x = -630/-9 x = 70⁰
Jadi besr sdt A adalah 70⁰
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ananekusuma21
90 - A = 2/11.(180-A) 90 - A = 360/11 - 2/11 A -A + 2/11 A = 360/11 - 90 -11/11 + 2/11 A = 360/11 - 990/11 -9/11 A = -630/11 A = 630/11 : 9/11 A = 630/11 . 11/9 A = 70˚
90 - x = 2/11 (180-x)
11(90-x) = 360-2x
990 - 11x = 360-2x
-11x+2x = 360-990
-9x = -630
x = -630/-9
x = 70⁰
Jadi besr sdt A adalah 70⁰
90 - A = 360/11 - 2/11 A
-A + 2/11 A = 360/11 - 90
-11/11 + 2/11 A = 360/11 - 990/11
-9/11 A = -630/11
A = 630/11 : 9/11
A = 630/11 . 11/9
A = 70˚