Tolong dijawab hari ini dikumpulkan???

Tolong dijawab hari ini dikumpulkan???

Jawaban:

a. d1 = 20 cm

d2 = 48 cm

b. K = 104 cm

Penjelasan dengan langkah-langkah:

Dik :

L = 480 cm²

d1 = 5/12 x d2

Dit :

a. d1 dan d2

b. Keliling

Jawab :

L = 1/2 x d1 x d2

480 = 1/2 x 5/12 x d2 x d2

480 = 5/24 x (d2)²

96 x 24 = (d2)²

d2 = √2.304

d2 = 48 cm

d1 = 5/12 x d2

= 5/12 x 48

= 20 cm

s² = (d1/2)² + (d2/2)²

s² = (20/2)² + (48/2)²

s² = 10² + 24²

s² = 100 + 576

s = √676

s = 26

K = 4 x s

= 4 x 26

= 104 cm

Jawaban:

A. diagonalnya 48cm dan 20 cm

B. kelilingnya 104 xm

Penjelasan dengan langkah-langkah:

$d_{1} = frac{5}{12} d_{2} \ \ frac{1}{2} times d_{1} times d_{2} = 480 \ frac{1}{2} times frac{5}{12} d_{2} times d_{2} = 480 \ frac{5}{24} d_{2} ^{2} = 480 \ 5d_{2} ^{2} = 480 times 24 \ d_{2} = sqrt{ frac{11520}{5} } \ d_{2} = sqrt{2304} \ d_{2} = \ d_{2} = 48cm$

$d_{1} = frac{5}{12} d_{2} = frac{5}{12} times 48 = 20cm$

A) jadi panjang kedua diagonalnya adalah 48 cm dan 20 cm

B) sisi miring

$s = sqrt{ ( frac{48}{2}) {2} + ( frac{20}{2}) {2} } \ = sqrt{ {24}^{2} + {10}^{2} } \ = sqrt{576 + 100} \ = sqrt{676} \ = 26 cm$

k = 4 × s = 4 × 26 = 104 cm