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Jawab:
segitiga I = L = 1/2 x a x t
= 1/2 x 22 x 13
= 22/2 = 11
= 11 x 13
= 143 cm²
segitiga II = L = 1/2 x a x t
= 1/2 x 29 x 16
= 16/2 = 8
= 29 x 8
= 232 cm²
JUMLAH LUAS =
L I + L II
143 cm² + 232 cm² = 375 cm²
OPSI D.
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Jawaban :
Luas kedua segitiga : 375 cm² ( D )
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Penjelasan :
⇒ Rumus Luas segitiga : ¹/₂ x a x t
- a = alas
- t = tinggi
Langkah-langkah :
⇒ Segitiga 1 :
= ¹/₂ x a x t
= ¹/₂ x 22 cm x 13 cm
= ¹/₂ x 286 cm²
= 143 cm²
⇒ Segitiga 2 :
= ¹/₂ x a x t
= ¹/₂ x 29 cm x 16 cm
= ¹/₂ x 464 cm²
= 232 cm²
⇒ Luas kedua segitiga :
= LΔ1 + LΔ2
= 143 cm² + 232 cm²
= 375 cm²