Question

What is the value of X?

Answer 1

Answer:

$\rm x=\frac{45}{2}$

$\rm \angle B=67.5 \degree$

Step-by-step explanation:

$\rm x + 3x + 90 = 180 \degree$

$\rm 4x + 90 = 180 \degree$

$\rm 4x = 180 -90$

$\rm 4x=90$

$\rm x=\frac{90}{4}$

$\rm x=\frac{45}{2}$

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value of $\rm x$?

$\bold{x=\frac{45}{2}}$

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what is the measure of angle B?

$\rm \angle B =\frac{45}{2} \times 3$

$\rm \angle B=\frac{135}{2}$

$\bold{\angle B=67.5 \degree}$