Luas juring KOL
[tex] \frac{ \alpha }{360°} \times \pi \times r \times r \\ \\ \frac{(360 °- 270°)}{360°} \times \frac{22}{7} \times 21 \: cm \times 21 \: cm \\ \\ \frac{90°}{360°} \times 1.386 \: {cm}^{2} \\ \\ 346,5 \: {cm}^{2} [/tex]
L.J KOL :
= 90/360(22/7(21(21)
= 1/4(22(441/7)
= 22/4(63)
= 22(63)/4
= 1.386/4
= 346,5 cm²
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Luas juring KOL
[tex] \frac{ \alpha }{360°} \times \pi \times r \times r \\ \\ \frac{(360 °- 270°)}{360°} \times \frac{22}{7} \times 21 \: cm \times 21 \: cm \\ \\ \frac{90°}{360°} \times 1.386 \: {cm}^{2} \\ \\ 346,5 \: {cm}^{2} [/tex]
L.J KOL :
= 90/360(22/7(21(21)
= 1/4(22(441/7)
= 22/4(63)
= 22(63)/4
= 1.386/4
= 346,5 cm²