Question

QUIZZZ !!!!

Luas dan keliling persegi panjang dengan diagonal 28 cm adalah .........​

Answer 1

Verified answer

asumsikan potongan diagonal membentuk 2 segitiga siku-siku dengan sudut 30 60 90

..

p = 28 × √3/2

p = 14√3 cm

..

l = 28 × 1/2

l = 14 cm

..

Luas

= p × l

= 14√3 × 14

= 196√3 cm²

..

Keliling

= 2(14√3 + 14)

= 28√3 + 28 cm

#Cmiiw

[tex]\boxed{\colorbox{ccddff}{Answered by Danial Alf'at}}[/tex]

Answer 2

CARI PANJANG :

= 28√3/2

= (28/2)√3

= (14/1)√3

= 14√3 CM

CARI LEBAR :

= 1/2(28)

= 1(28)/2

= 28/2

= 14/1

= 14 CM

LUAS :

= (14√3(14)

= (14(14)√3

= 196√3 CM²

KELILING :

= 2(14√3) + 2(14)

= 2(14)√3 + 28

= 28√3 + 28 CM