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Luas juring/154 cm² = 90°/360°
Luas juring/154 cm² = 1/4
Luas juring = 1/4 x 154 cm² = 38,5 cm²
Luas segitiga = 1/2 x 7 cm x 7 cm = 24,5 cm²
Luas tembereng = Luas juring - Luas segitiga
= 38,5 cm² - 24,5 cm²
= 14 cm²
=
=38,5cm²
LΔBOC=
= cm²
L tembereng= LO-LΔBOC
=38,5-24,5
=14cm²