Tentukan keliling dan luas lingkaran 1 . r=14cm 2 . r=10 cm 3. r=21 cm 4. r=20 cm 5.r=42 cm pake car.... Question from @tiaanandalucky

Asruul 1) K = 2 . π . r
   = 2 . $\frac{22}{7}$ . 14
   = 88 cm
L = π . r²
= $\frac{22}{7}$ . 14 . 14
   = 616 cm²

2) K = 2 . π . r
= 2 x 3,14 x 10
= 62,8 cm
L = π . r²
  = 3,14 x 10 x 10
= 314 cm²

3) K = 2 . π . r
= 2 . $\frac{22}{7}$ . 21
= 132 cm
L = π . r²
= $\frac{22}{7}$ . 21 . 21
= 1.386 cm²

4) K = 2 . π . r
= 2 x 3,14 x 20
= 125,6 cm
L = π . r²
= 3,14 x 20 x 20
= 1.256 cm²

5) K = 2 . π . r
= 2 . $\frac{22}{7}$ . 42
= 264 cm
L = π . r²
= $\frac{22}{7}$ . 42 . 42
= 5.544 cm²

1 votes Thanks 3

Asruul Jangan lupa tandai sbg jawban terbaik agar 25% poin kamu kembali

npangestu47 Luas lingkaran rumusnya
$L= \pi r^{2}$

jadi nomor
$1. \\ L = \pi r^{2} \\ = \frac{22}{7} . 14^{2} \\ = \frac{22}{7}.14.14 \\ = 616 cm \\ \\ 2. \\ L= \pi r^{2} \\ =3,14. 10^{2} \\ =3,14.100 \\ =314 cm \\ \\ 3. \\ L= \pi r^{2} \\ = \frac{22}{7} . 21^{2} \\ \frac{22}{7}.21.21 \\ = 1386 cm \\ \\ 4. \\ L= \pi r^{2} \\ = 3,14.20^{2} \\ = 3,14.400 \\ = 1256 cm \\ \\ 5. \\ L= \pi r^{2} \\ = \frac{22}{7}.42^{2} \\ = \frac{22}{7}.42.42 \\ = 5544cm$

Untuk jari-jari ( r ) kelipatan tujuh gunakan \pi nya $\frac{22}{7}$ jika jari-jari ( r ) nya bukan kelipatan tujuh maka gunakan \pi nya 3,14

Semoga membantu :)

0 votes Thanks 2

tiaanandalucky kelilingnya mna kak ?

Complete each sentence woth a suitable adverb

Dizoom aja dan digeser, mohon yah yg baikk tlg bantuannya .....

Geserrr aja !!!!!.....

Gampangggggggggggggggggggg

Gampangggggggg....................

Gampanggggggg .. tlg dibantuuu

Gampang!geser aja gambarnya

Digeser aja! soalnya gampang

Gampang!di geser aja gambarnya.

Complete the conversations based on the situations and the pictures below. then practice one of them in front of the class. gesek aja gambarnya!

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