Question

Question #4d873

Answer 1

`x^@=109^@`

Explanation:

The sum of internal angles for a polygon, equals the number `n` of independent triangles that can be arranged to calculate it's area, times `180^@`. In the present case `n = 3`. (This number equals also the number of sides minus `2`).

So we have `x^@+121^@+108^@+102^@+100^@=3 cdot 180^@`

Solving for `x` we get

`x^@ = 109^@`