rumus luas juring
α : 360 x π r ²
72 : 360 x 22 : 7 x 14 x 14
= 123,2 cm ²
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rumus luas juring
α : 360 x π r ²
72 : 360 x 22 : 7 x 14 x 14
= 123,2 cm ²
#semoga membantu
= π × r × r × ¼ (90°)
= 22/7 × 14cm × 14cm × ¼
= 154 cm²
Luas lingkaran 72°
--> 90/ 154 = 72 / x
--> 90.x = 154.72
--> 90x = 11.088
--> x = 11.088 / 90
--> x = 123,2 cm²
Maka luas bangunan tersebut adalah 123,2 cm².
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