Minta tolong dong 2 pertanyaan

Minta tolong dong 2 pertanyaan

Penjelasan dengan langkah-langkah:

1a)

${a}^{2} + {a}^{2} = ( { sqrt{32} })^{2} \ 2 {a}^{2} = 32 \ {a}^{2} = frac{32}{2} \ {a}^{2} = 16 \ a = sqrt{16} = 4$

$b = sqrt{ {72}^{2} + {72}^{2} } \ = sqrt{2( {72)}^{2} } \ = 72 sqrt{2}$

panjang besi merah

$= 6 times sqrt{ {6}^{2} + {6}^{2} } \ = 6 times sqrt{2( {6)}^{2} } \ = 6(6 sqrt{2} ) \ = 36 sqrt{2}$

= 36(1,4)

= 50,4 m

maka harga besi merah

= 50,4 x 20.000

= Rp 1.008.000,-