Bantuuuuin

<p>Sifat jajar genjang :</p><ul><li>Mempunyai 4 sisi</li><li>Sisi-sisi yang berhadapan sejajar dan sama panjang</li><li>Mempunyai 4 sudut</li><li>Sudut-sudut yang berhadapan sama besar</li></ul><p>&nbsp;</p><p>Jajar genjang mempunyai dua sudut lancip dan dua sudut tumpul.</p><p>(Untuk jelasnya lihat gambar dibawah)</p><p>&nbsp;</p><p>&lt;LKN = &lt;LMN = 66°</p><p>&lt;KLM = &lt;KNM = (360° - (&lt;LKN + &lt;LMN)) : 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= (360° - (66° + 66°)) : 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= (360° - 132°) : 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 228° : 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 114°</p><p>a = 114° dan b = 114°</p><p>Nilai a + b = 114° + 114° = 228°</p><p>&nbsp;</p><p>Jawaban : <strong>C</strong></p>