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2
= 192 cm²
L 2 = 18 × 12
2
= 108 cm²
192 + 108 = 300 cm²
jadi, luas bangun gabunganya adalah 300 cm²
(a + b) . t / 2
(13 + 30) . 8 / 2
33 . 4 =
Luas segitiga
(a . t) / 2
(30 - 12) . (20 - 8) / 2
18 . 12 / 2
18 . 6 =
Luas = Luas trapesium + luas segitiga
=