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# Isosceles Triangle

ACTMAT-JE13KE

$\Delta$ABC is an isosceles triangle with vertex A and $AB = AC.$

If the measure of ${\angle A}$ is $\frac{1}{4}$ the measure of ${\angle B}$, what is the measure, in degrees, of ${\angle A}$?

A

$20°$

B

$30°$

C

$45°$

D

$60°$

E

$80°$