Finding area of shaded region on graph

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With the three equations provided, I can find the coordinates of intersection. However, I have no idea how to find the height as there isnt any right angles. The graph is apparently a triangle, how could I possibly find its area?

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1 Answer

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With tools that you will probably already be familiar with:

The $x$-axis divides your triangle into two triangles whose common base you can find by computing the $x$-intercept of one of the lines.

Remember that "half the height times the base" is not only for right triangles, but for any triangle where you know (or can find) a base and the height perpendicular to it.

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