Bantu dong Kalau bisa semua Makasih

<p>1. (Gambar yang benar ada dibawah)</p><p>&nbsp; &nbsp; &nbsp;AB = BE = 6 cm</p><p>&nbsp; &nbsp; &nbsp;EF = 10 cm</p><p>&nbsp; &nbsp; &nbsp;BF = √(EF² - BE²)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= √(10² - 6²)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= √(100 - 36)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= √64</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 8 cm</p><p>&nbsp; &nbsp; &nbsp;BF = BC = 8 cm</p><p>&nbsp; &nbsp; &nbsp;CE = BC - BE&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 8 - 6&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 2 cm</p><p>&nbsp; &nbsp; &nbsp; Jadi panjang CE adalah 2 cm &nbsp; &nbsp; &nbsp;&nbsp;</p><p>&nbsp;</p><p>2. &lt;A = &lt;F = 80°</p><p>&nbsp; &nbsp; &nbsp;&lt;E = &lt;C = 27°</p><p>&nbsp; &nbsp; &nbsp;FD = AB</p><p>&nbsp; &nbsp; &nbsp;Sisi yang sama panjang dengan FD adalah AB</p><p>&nbsp; &nbsp; &nbsp;&lt;D = 180° - (&lt;E + &lt;F)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 180° - (80° + 27°)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 180° - 107°</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 73°</p><p>&nbsp;</p><p>3. Segitiga ABC dan DEF kongruen dengan syarat <strong>Sudut - Sisi - Sudut (Sd - S - Sd)</strong></p><p>&nbsp;</p><p>4. Banyak segitiga yang kongruen ada <strong>4 pasang</strong></p><p>&nbsp;</p><p>5. Segitiga ABE dan CDE kongruen karena</p><ul><li>Sisi-sisi yang bersesuaian sama panjang (sisi - sisi - sisi)</li></ul><p>&nbsp; &nbsp; &nbsp; &nbsp;AB = CD, AE = ED dan BE = EC</p><ul><li>Sisi - sudut - sisi</li></ul><p>&nbsp; &nbsp; &nbsp; AE = ED, &lt;AEB = &lt;CED, BE = EC</p><p>&nbsp; &nbsp; &nbsp;</p><p>&nbsp; &nbsp;&nbsp;</p>