Matematika N0.1,,,,6x25²+14²=? NO.2,,,Diketahui keliling lingkaran adalah 44cm maka berapa luasnya

ettielefflerulv – March 10, 2023

N0.1,,,,6x25²+14²=?

NO.2,,,Diketahui keliling lingkaran adalah 44cm maka berapa luasnya

Jawaban:

1. 6 × 25² + 14²

= 6 × (25 × 25) + 14²

= 6 × 625 + 14²

= 3. 750 + 14²

= 3. 750 + (14 × 14)

= 3. 750 + 196

= 3. 946

2. K = 2 × π × r

= 44 = 2 × 22/7 × r

= 44 = 44/7 × r

= r = 44 × 7/44

= r = 7

L = π × r²

= 22/7 × 7²

= 22/7 × (7 × 7)

= 22/7 × 49

= 22 × 7

= 154 cm²

Penjelasan dengan langkah-langkah:

Semoga membantu.

1) 6 × 25² + 14²

= 6 × (25 × 25) + (14 × 14)

= 6 × 625 + 196

= 3.750 + 196

= 3.946 ✔️

2) K = 44 cm

K = 2πr

44 = 2 × 22/7 × r

44 = 44/7 × r

308 = 44 × r

r = 308 ÷ 44

r = 7 cm

L = πr²

= 22/7 × 7 × 7

= 22 × 1 × 7

= 154 cm² ✔️

Teu - ba ~

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