Lines, Angles, & Triangles - SAT Math Quiz

In the diagram, triangle $ABC$ has an exterior angle at vertex $C$ formed by extending side $BC$ past $C$. The exterior angle is $127^\circ$, and angle $A$ is $49^\circ$. What is the measure of angle $B$?

Lines, Angles, & Triangles Practice Test

Triangle $XYZ$ has side lengths $XY=7$, $YZ=10$, and $XZ=x$. Which of the following values of $x$ is possible?

In the diagram, triangle $ABC$ has an exterior angle at vertex $C$ formed by extending side $BC$ past $C$. The exterior angle is $127^\circ$, and angle $A$ is $49^\circ$. What is the measure of angle $B$?

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