Question

bantu jawab berserta caranya?

thx​

Answer 1

Penjelasan dengan langkah-langkah:

LATIHAN SOAL

7. A

Keliling persegi panjang = Keliling persegi

2 × ( p + l ) = 4 × s

p + l = 2 × s

4x + 2 + x + 3 = 2 × 3x

5x + 5 = 6x

6x – 5x = 5

x = 5

Luas persegi = s²

Luas persegi = (3x)²

Luas persegi = 9(5)²

Luas persegi = 9 × 25

Luas persegi = 225 cm²

8. B

AB = AD

BE DF

20 = AD

18 9

18 × AD = 20 × 9

18 × AD = 180

AD = 180

18

AD = 10 cm

Keliling ABCD = 2 × ( AB + AD )

Keliling ABCD = 2 × ( 20 + 10 )

Keliling ABCD = 2 × 30

Keliling ABCD = 60 cm