Find the area of the triangle

The area of the triangle is:

You can easily find the area of a triangle using the formula:

Where h is the height of the triangle, and b the base.

Looking at the figure we can see that h = 7, but we need to discover the base, we know that the base is:

Where:

Therefore, our base length is:

Then we can just apply the formula for the area:

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step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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