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有一個公式. 橢圓上的一點與兩焦點構成的三角形叫作焦點三角形 焦點三角形有面積公式,這個公式是S=b^2tanθ/2(b的平方乘以θ/2的正切值,b是短半軸長,θ是∠F1PF2) ∴S=16×√3/3=16√3/3
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