Express $\frac{15 + 10i}{1 + 2i}$ in rectangular form.
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Given :
- ∠F = ∠J
- ∠D = ∠H
- ∠E = ∠I
Sum of all angles in a triangle = 180°
Which means :
- 41 + 20 + 15x - 1 = 180
- Thus, the value of x = 18
Measure of angle 15x-1 :
Thus, the measure of angle 15x-1 = 119°
Let us place 8 in the place of x to see if we have found out the correct measure of the angles :
Since the measures of all the angle sum up to form 180°, we can conclude that we have found out the correct measure of each of the angles.
Therefore, the value of x = 8
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