Citra A

04 Maret 2024 12:38

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Citra A

04 Maret 2024 12:38

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Sumber W

Silver

07 Maret 2024 11:59

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<p>𝞪 = 90°</p><p>r = 10,5 cm</p><p>d = 2 x r = 2 x 10,5 = 21 cm</p><p>a. Panjang busur</p><p>&nbsp; &nbsp; &nbsp;90°/360° = PB/(22/7 x 21)</p><p>&nbsp; &nbsp; &nbsp;1/4 = PB/66</p><p>&nbsp; &nbsp; &nbsp;PB = 66/4</p><p>&nbsp; &nbsp; &nbsp;PB = 16,5 cm</p><p>&nbsp; &nbsp; &nbsp;Panjang busurny adalah 16,5 cm</p><p>&nbsp;</p><p>b. Luas Juring (LJ)</p><p>&nbsp; &nbsp; &nbsp;90°/360° = LJ/(22/7 x 10,5 x 10,5)</p><p>&nbsp; &nbsp; &nbsp;1/4 = LJ/ 346,5</p><p>&nbsp; &nbsp; &nbsp;LJ = 346,5/4</p><p>&nbsp; &nbsp; &nbsp;LJ = 86,625 cm<sup>2</sup></p><p>&nbsp; &nbsp; &nbsp;Luas juring adalah 86,625 cm<sup>2</sup></p><p>&nbsp;</p><p>c. Luas tembereng</p><p>&nbsp; &nbsp; &nbsp;L. tembereng = LJ - Luas segitiga</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 86,625 - (1/2 x 10,5 x 10,5)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 86,625 - 55,125</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 31,5 cm<sup>2</sup></p>

𝞪 = 90°

r = 10,5 cm

d = 2 x r = 2 x 10,5 = 21 cm

a. Panjang busur

     90°/360° = PB/(22/7 x 21)

     1/4 = PB/66

     PB = 66/4

     PB = 16,5 cm

     Panjang busurny adalah 16,5 cm

 

b. Luas Juring (LJ)

     90°/360° = LJ/(22/7 x 10,5 x 10,5)

     1/4 = LJ/ 346,5

     LJ = 346,5/4

     LJ = 86,625 cm2

     Luas juring adalah 86,625 cm2

 

c. Luas tembereng

     L. tembereng = LJ - Luas segitiga

                                  = 86,625 - (1/2 x 10,5 x 10,5)

                                  = 86,625 - 55,125

                                  = 31,5 cm2


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