= 17 cm ÷ 2
= 8,5 cm
= 8 cm ÷ 2
= 4 cm
= 15 cm ÷ 2
= 7,5 cm
= 3,14 × (7,5² + 4² - 8,5²) + 15 × 8
= 3,14 × (56,25 + 16 - 72,25) + 120 cm²
= 3,14 × 0 + 120 cm²
= 0 + 120 cm²
= 120 cm²
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= 17 cm ÷ 2
= 8,5 cm
= 8 cm ÷ 2
= 4 cm
= 15 cm ÷ 2
= 7,5 cm
= 3,14 × (7,5² + 4² - 8,5²) + 15 × 8
= 3,14 × (56,25 + 16 - 72,25) + 120 cm²
= 3,14 × 0 + 120 cm²
= 0 + 120 cm²
= 120 cm²