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Area of a triangle whose vertices contain a parameter equals a given value

This type of question, asked 2 times: 2021 Paper 21, 14 Jun 2022. All 2 questions below, oldest first.

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  1. Question 1

    2021 Paper 21

    69
    Let A(a,0),B(b,2 b+1)A(a,0),B(b,2\text{ }b + 1) and C(0, b),b≠0,∣ b∣≠1C(0,\text{ }b),b \neq 0,|\text{ }b| \neq 1, be points such that the area of triangle ABCABC is 1 sq. unit, then the sum of all possible values of aa is :

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  2. Question 2

    14 Jun 2022

    160
    Let the area of the triangle with vertices A(1,α)A(1,\alpha), B(α,0)B(\alpha,0) and C(0,α)C(0,\alpha) be 4 sq. units. If the point (α,−α),(−α,α)(\alpha, - \alpha),( - \alpha,\alpha) and (α2,β)\left( \alpha^{2},\beta \right) are collinear, then β\beta is equal to

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