Jawaban:
diketahui diameter suatu lingkaran 14 cm luas lingkaran tersebut adalah ...
[tex] \sf Luas = \pi \times {r}^{2} [/tex]
[tex]\sf Luas = \pi \times ( { \frac{1}{2} \times d) }^{2} [/tex]
[tex]\sf Luas = \frac{22}{7} \times ( { \frac{1}{2} \times 14) }^{2} [/tex]
[tex]\sf Luas = \frac{22}{7} \times {7}^{2} [/tex]
[tex]\sf Luas = \frac{22}{7} \times 49[/tex]
[tex]\sf Luas = 22 \times 7[/tex]
[tex]\sf Luas = 154 \: {cm}^{2} [/tex]
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Jawaban:
Penyelesaian :
diketahui diameter suatu lingkaran 14 cm luas lingkaran tersebut adalah ...
Luas lingkaran
[tex] \sf Luas = \pi \times {r}^{2} [/tex]
[tex]\sf Luas = \pi \times ( { \frac{1}{2} \times d) }^{2} [/tex]
[tex]\sf Luas = \frac{22}{7} \times ( { \frac{1}{2} \times 14) }^{2} [/tex]
[tex]\sf Luas = \frac{22}{7} \times {7}^{2} [/tex]
[tex]\sf Luas = \frac{22}{7} \times 49[/tex]
[tex]\sf Luas = 22 \times 7[/tex]
[tex]\sf Luas = 154 \: {cm}^{2} [/tex]