In equalataral triangle, AD is altitude, then 4Ad² equals to -
(a) 2BD² (b) 2DC² (c) BC² (d) 3AB²
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Answered by
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Step-by-step explanation:
IN THE TRIANGLE AD IS ALTITUDE .
AD²+DB²=AB²
⇒AD²+(1/2 * BC)²=AB²
⇒AD²+BC²/4=AB²
⇒4AD²+BC²=4AB²
⇒4AD²=4AB²-BC²
⇒4AD²=4AB²-AB²
⇒4AD²=3AB²
⇒AD²=3/4*AB²
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