Question

Tolong pake cara ...

Answer 1

L = a x t
40 = 10 x t
t = 4 cm

AE = AB - EB = 10 - 7 = 3 cm

AD = √ED² + AE² = √4² + 3² = √25 = 5 cm

Keliling = 2 x AD + 2 x AB = 2 x 5 + 2 x 10 = 10 + 20 = 30 cm (B)

Semoga Membantu

Answer 2

L = 40 cm²
⇒ AB × ED = 40
⇒ 10 × ED = 40
⇒ ED = 4 cm

Sehingga

AD² = ED² + AE²
       = 4² + (10 - 7)²
       = 4² + 3²
       = 16 + 9
AD  = √25
AD  = 5 cm


Jadi,

K = 2(AD + AB)
   = 2(5 + 10)
   = 30 cm


Terimakasih semoga membantu