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2 problems match “triangle angle sum”. Clear

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1. Angle in two isosceles triangles ●●○○○ 20 ptsTriangles $ABC$ and $ADC$ are isosceles with $AB=BC$ and $AD=DC$. Point $D$ is inside $\triangle ABC$, $\angle ABC = 40^\circ$, and $\angle ADC = 140^\circ$. Find the measure of $\angle BAD$ in degrees.
2. Angle NCB in a triangle ●●●○○ 50 ptsIn $\triangle ABC$, $\angle ABC=50^{\circ}$ and $\angle ACB=20^{\circ}$. Point $N$ is inside $\triangle ABC$ with $\angle NAB=40^{\circ}$ and $\angle NBC=30^{\circ}$. Find the measure of $\angle NCB$ in degrees.