4 years ago

Do understand how to do this at all find the sum

Mathematics

1 answer:

storchak [24]4 years ago

6 0

-9/(mn^2)+m^2/n we make a mn^2 a common denominator...

-9/(mn^2)+(nm^3)/(mn^2)

(nm^3-9)/(mn^2)

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In ∆ABC the angle bisectors drawn from vertices A and B intersect at the point D. Find m∠ADB if

Svetllana [295]

Answer: ∠ABD = $\bold{\frac{1}{2}}$ ∠C

<u>Step-by-step explanation:</u>

$\angle A + \angle B + \angle C = 180^o\\\\\dfrac{1}{2}\angle A+\dfrac{1}{2}\angle B+\angle D=180^o\\\\\\\text{Solve the system by multiplying the second equation by -2}\\\angle A + \angle B + \angle C = 180^o\\\underline{-\angle A - \angle B - 2\angle D = -180^o}\\.\qquad \qquad \quad \angle C-2\angle D=0\\.\qquad \qquad \qquad \qquad \angle C=2\angle D\\.\qquad \qquad \qquad \quad \dfrac{1}{2}\angle C=\quad \angle D\\$