Given that an equilateral triangle and an isosceles triangle share a common side, and the triangle $ABC$ is equilateral, what is the measure of angle $\angle ABC$ in degrees?

Given two parallel lines cut by a transversal, if one of the alternate interior angles measures $m_1=61.8°$, what is the measure of the corresponding alternate interior angle?

Given triangle $△\mathrm{jkl}$, which equation could be used to find $\angle j$ using the Law of Sines?

Given triangle $ABC$ where $A$ and $B$ are on straight lines $l$ and $m$ respectively, and the measure of angle $A$ is $43°$ and angle $B$ is $47°$, what is the measure of angle $y$ (angle $C$) in degrees?

Which of the following combinations of measurements could form a triangle according to the $Law of Sines$?

Given two triangles $ABC$ and $DEF$ where $\angle A=\angle D$, $\angle B=\angle E$, and $\frac{AB}{DE}=\frac{BC}{EF}$, which triangles in the diagram are congruent?

Given triangle $△efg$, which equation could be used to find the measure of angle $e$ using the Law of Sines?

Which of the following lists of angle measures could be the angle measures of a triangle?

Which of the following correctly states the Law of Sines for triangle $ABC$ with sides $a$, $b$, $c$ opposite angles $A$, $B$, $C$?