Jawaban:
Keliling total = 392 cm
Luas = 1.902 cm^2
^2 = pangkat 2
Penjelasan dengan langkah-langkah:
Keliling persegi panjang = 2 x (P+L)
= 2 x (60+20)
= 2 x 80 = 160cm
Keliling Segitiga = A x B x C
= 18 + 26 + 42
= 86 cm
Keliling persegi = 4 x s
= 4 x 18
= 72 cm
Keliling total = 234 +86 + 72
= 392 cm
Luas Persegi panjang = P x L
= 60 x 20
= 1.200 cm^2
Luas Segitiga = A x T : 2
= 18 x 42 : 2
= 756 : 2
= 378 cm^2
Luas Persegi = S^2
= 18 x 18
= 324cm^2
Luas Total = 1.200 + 378 + 324
= 1.902 cm^2
Semoga Membantu
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