Jawaban:
D. 900 cm²
Penjelasan dengan langkah-langkah:
L2persegi = 2 × s × s = 2× 30 × 30 = 1800 cm²
Larsir = 2 × luas layang layang
L layang-layang = 2 × luas segitiga
Segitiga dengan :
a = 30/2 = 15 cm
t = 30 cm
Sehingga
L arsir = 2 × 2 × luas segitiga
L arsir = 2 × 2 ( ½ . 15 . 30)
= 4 (225)
= 900 cm²
L tdk arsir = 1800 - 900 = 900 cm²
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Jawaban:
D. 900 cm²
Penjelasan dengan langkah-langkah:
L2persegi = 2 × s × s = 2× 30 × 30 = 1800 cm²
Larsir = 2 × luas layang layang
L layang-layang = 2 × luas segitiga
Segitiga dengan :
a = 30/2 = 15 cm
t = 30 cm
Sehingga
L arsir = 2 × 2 × luas segitiga
L arsir = 2 × 2 ( ½ . 15 . 30)
= 4 (225)
= 900 cm²
L tdk arsir = 1800 - 900 = 900 cm²