10. sebuah Bundaran di taman kota berdiameter 40 m. luas Bundaran adalah???
mohon bantuanya ya kak
mohon bantuanya ya kak
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L = π × r × r
L = 3,14 × ( 40 ÷ 2 ) × r
L = 3,14 × 20 × 20
L = 62,8 × 20
L = 1.256 m²
Penjelasan dengan langkah-langkah:
– Cari jari" dhulu
= d/2
= 40/2
= 20
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L = π × r × r
L = 3,14 × 20 × 20
L = 3,14 × 400
L = 1.256 Cm²