#backtoschool2019
maaf klo salah
terimakasih
Jawaban:
K=32/7+(51/14)√2, L=10/(2√2-1)
Penjelasan dengan langkah-langkah:
Keliling= 2xlebar+2xpanjang
=2(8/(4-√2))+2(10/(4√2))
=16/(4-√2)+20/(4√2)
kalikan sekawannya:
16/(4-√2) x (4+√2)/(4+√2)
=16(4+√2)/(16-2)=16/14(4+√2)
=8/7(4+√2)=32/7+8/7√2
20/(4√2)=5/√2=(5/2)√2
Keliling=32/7+(8/7)√2+(5/2)√2
=32/7+(16/14)√2+(35/14)√2
=32/7+(51/14)√2
Luas = lebar x panjang
=8/(4-√2).10/(4√2)
kalikan pembilang dengan pembilang, penyebut dengan penyebut:
80/((4-√2)(4√2))
(4-√2)(4√2)=16√2-4.2=16√2-8
Luas=80/(16√2-8)=10/(2√2-1)
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#backtoschool2019
maaf klo salah
terimakasih
Jawaban:
K=32/7+(51/14)√2, L=10/(2√2-1)
Penjelasan dengan langkah-langkah:
Keliling= 2xlebar+2xpanjang
=2(8/(4-√2))+2(10/(4√2))
=16/(4-√2)+20/(4√2)
kalikan sekawannya:
16/(4-√2) x (4+√2)/(4+√2)
=16(4+√2)/(16-2)=16/14(4+√2)
=8/7(4+√2)=32/7+8/7√2
20/(4√2)=5/√2=(5/2)√2
Keliling=32/7+(8/7)√2+(5/2)√2
=32/7+(16/14)√2+(35/14)√2
=32/7+(51/14)√2
Luas = lebar x panjang
=8/(4-√2).10/(4√2)
kalikan pembilang dengan pembilang, penyebut dengan penyebut:
80/((4-√2)(4√2))
(4-√2)(4√2)=16√2-4.2=16√2-8
Luas=80/(16√2-8)=10/(2√2-1)