ayo dijawab yang bisa.

(a+b) x t /2
(14+9) x t /2 = 138
23 x t /2 = 138
23 x t = 138x2 = 276
t = 276/23 = 12
t = 12
ditanya sisi miring
5^2 + 12^2 = SR^2
25 + 144 = SR^2
169 = SR^2
SR = akar 169 = 13

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Diketahui :

Step - 1
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Cari tinggi, t = ___?

Trapesium PQRS
Luas = 1/2 x (PS + QR) x t
138 = 1/2 x (14 + 9) x t
138 x 2 = (23) x t
276 = 23 x t
t = 12 cm

Step-2
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SR = √(t)² + (PS - QR)²
SR = √(12)² + (14 - 9)²
SR = √(12)² + (5)²
SR = √(144 + 25)
SR = √(169)
SR = 13 cm

Jawaban : B

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FZA