Trapesium PTUV sebangun dengan trapesium PQRS. -ditanya; Luas daerah trapesium PQRS adalah... a. 117 cm^2 b. 210 cm^2 c. 234 cm^2 d. 468 cm^2 [maaf klo gmbrny k

Mapel : Matematika
Bab : Kesebangunan

[tex] \frac{20}{20 + tq} = \frac{8}{12} [/tex]
[tex]12 \times 20 = 8(20 + tq)[/tex]
[tex]240 = 160 + 8tq[/tex]
[tex]80 = 8tq[/tex]

[tex]10 = tq[/tex]
TQ = 10 CM

cari SR


[tex] \frac{20}{20 + 10} = \frac{6}{sr} [/tex]
[tex]20sr = 6 \times 30[/tex]
[tex]20sr = 180[/tex]
[tex]sr = 9 \: cm[/tex]


L PQRS = 1/2(a + b) × t
L PQRS = 1/2(30 + 9) × 12
L PQRS = 1/2 × 39 × 12
L PQRS = 6 × 39
L PQRS = 234 cm^2

(C)