hai kak,saya minta tolong jawab pertanyaan ini dengan benar dan rumuss .. terimakasih
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AE = 5 cm
EB = 15 cm
AB = AE + EB = 5 + 15 = 20 cm
Hence,
L = alas x tinggi
L = AB x DE
240 = 20 x DE
DE = 240/20
DE = 12 cm
AD² = AE² + DE²
AD² = 5² + 12²
AD² = 25 + 144
AD² = 169
AD = √169
AD = 13 cm
K = 2 x (AB + AD)
K = 2 x (20 + 13)
K = 2 x (33)
K = 66 cm