In the figure below, $PQ$ is parallel to $RS$, where $A$ is a point on $PQ$ and $B, C$ are

Question

In the figure below, $PQ$ is parallel to $RS$, where $A$ is a point on $PQ$ and $B, C$ are two points on $RS$. Using this figure, show that the sum of the sizes of all the interior angles in any triangle is $180^\circ$.

Accepted Answer

$180^\circ$

Angles Formed by Two Parallel Lines and a Transversal

Angles Formed by Two Parallel Lines and a Transversal

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