Tolong dibantu ya kak
Jawaban:
210 cm²
Penjelasan dengan langkah-langkah:
[tex]t = \sqrt{ {bc}^{2} - ({ab - dc})^{2} } \\ = \sqrt{ {13}^{2} - ({20 - 15})^{2} } \\ = \sqrt{ {13}^{2} - {5}^{2} } \\ = \sqrt{169 - 25} \\ = \sqrt{144} \\ = 12 \: cm[/tex]
L = (ab+dc)/2 x t
= (20 + 15)/2 x 12
= 35/2 x 12
= 210 cm²
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