Tolong jawab

<p>𝞪 = 360°- 270° = 90°</p><p>karena sudur pusatnya 90° maka&nbsp;</p><p>L. Juring = 1/4 x Luas lingkaran</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1/4 x 𝞹 x r²</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1/4 x 22/7 x 21 x 21</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 346,5 cm²</p><p>&nbsp;</p>