Question

halooo mohon dibantu yaa​

Answer 1

Verified answer

keliling ½ lingkaran

[tex] = \frac{1}{2} \times \pi \times d[/tex]

[tex] = \frac{1}{2} \times 3.14 \times 20 \: cm[/tex]

[tex] = a. \: 31.4 \: cm[/tex]

Answer 2

Jawaban:

B. 51,4 cm

Penjelasan dengan langkah-langkah:

Keliling bangun pada gambar

= Keliling 1/2 lingkaran + diameter

[tex] = ( \frac{1}{2} \times \pi \: d) + d \\ = ( \frac{1}{2} \times 3.14 \times 20) + 20 \\ = (3.14 \times 10) + 20 \\ = 31.4 + 20 \\ = 51.4 \: cm[/tex]

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