Question

In an equilateral triangle ABC, if AD is parallel to BC. Prove that 3AB^2 = 4AD^2.
Also wish me luck for my tommorow's maths exam.
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Answer 1

Step-by-step explanation:

Is the answer

Hope it is helpful

Answer 2

Step-by-step explanation:

Given:

AABC is an equilateral triangle.

AD perpendicular to BC.

To Prove:

3AB? = 4AD2

Proof:

In AADB and AADC,

<ADB = <ADC = 90° (R)

AB = AC ( hypotenuse)(H)

AD = AD ( common side )(S)

Therefore,

In AADB,

AB2 = AD2 + BD2

PLEASE REFER THE IMAGE GIVEN HERE