= 8 cm
= 15 cm
= d1 × d2 ÷ 2
= AC × BD ÷ 2
= (6 + 15) × (8 + 8) ÷ 2
= 21 cm × 16 cm ÷ 2
= 336 cm² ÷ 2
= 168 cm²
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= 8 cm
= 15 cm
= d1 × d2 ÷ 2
= AC × BD ÷ 2
= (6 + 15) × (8 + 8) ÷ 2
= 21 cm × 16 cm ÷ 2
= 336 cm² ÷ 2
= 168 cm²