Jawab: 200 cm²
Penjelasan dengan langkah-langkah:
Luas persegi = (1/2) x diagonal x diagonal
= (1/2) x 20 cm x 20 cm
= 200 cm²
Trigonometri
[tex] \frac{s}{ \sin(45 ^{\circ} ) } = \frac{20}{ \sin( {90}^{\circ} ) } [/tex]
[tex] \frac{s}{ \frac{ \sqrt{2} }{2} } = \frac{20}{1} [/tex]
[tex]s \: = \: 20 \times \frac{ \sqrt{2} }{2} [/tex]
s = 10 × √2
s = 10√2
Maka luas persegi tersebut
l = s²
= (10√2)²
= (10².√2²)
= 100.2
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Jawab: 200 cm²
Penjelasan dengan langkah-langkah:
Luas persegi = (1/2) x diagonal x diagonal
= (1/2) x 20 cm x 20 cm
= 200 cm²
Penjelasan dengan langkah-langkah:
Trigonometri
[tex] \frac{s}{ \sin(45 ^{\circ} ) } = \frac{20}{ \sin( {90}^{\circ} ) } [/tex]
[tex] \frac{s}{ \frac{ \sqrt{2} }{2} } = \frac{20}{1} [/tex]
[tex]s \: = \: 20 \times \frac{ \sqrt{2} }{2} [/tex]
s = 10 × √2
s = 10√2
Maka luas persegi tersebut
l = s²
= (10√2)²
= (10².√2²)
= 100.2
= 200 cm²