If the extremities of the base of an isoscelestriangle are the points

Question:

If the extremities of the base of an isoscelestriangle are the points $(2 \mathrm{a}, 0)$ and $(0, \mathrm{a})$ and the equation of one of the sides is $x=2 a$, then the area of the triangle, in square units, is:

  1. $\frac{5}{2} a^{2}$

  2. $\frac{5}{4} a^{2}$

  3. $\frac{25 \mathrm{a}^{2}}{4}$

  4. $5 \mathrm{a}^{2}$


Correct Option: 1

Solution:

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