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16² + 12² = √400 = 20 cm
sisi miring 2 = √52²-20² = 48 cm
keliling = 16+12+52+48 = 130 cm
23. 48 cm
Lalu kita hitung alas segitiga ke 2
Pagar keliling = 12+16+52+48 = 128 m
23. Sisi Kiri = Sisi Kanan dan Sisi atas = Sisi bawah
Jadi 2(10) + 2(4+4+4) + 2(4)
=20+24+8
= 52cm