Penjelasan dengan langkah-langkah:
AC = √12²+9²
AC = √144+81
AC = √225
AC = 15 cm
L = 12×9÷2
L = 108 ÷ 2
L= 54 cm²
L = 15 ×8÷2
L = 120 ÷ 2
L = 60 cm2
54 + 60 = 114 cm²
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Penjelasan dengan langkah-langkah:
1. Cari panjang AC dulu
AC = √12²+9²
AC = √144+81
AC = √225
AC = 15 cm
2. Luas Segitiga ABC
L = 12×9÷2
L = 108 ÷ 2
L= 54 cm²
3. Luas Segitiga ACD
L = 15 ×8÷2
L = 120 ÷ 2
L = 60 cm2
4. Luas bangun ABCD
54 + 60 = 114 cm²
Semoga membantu, salam
_____________________
~Stingray