How does inscribing a triangle in a rectangle find area?

A rectangle is quadrilateral with congruent and parallel opposite sides.

Mathematically, the area of a rectangle is

Where is the base and is the height.

Now, the area of a triangle is defined as

Where is the base and is the height.

As you can notice, the are of a triangle is half of the area of a rectangle.

So, if we inscribe a triangle in a rectangle, we can find the area by doubling the triangle area.

i think there was a typo. you wrote pat brings 3 quarts of ice-cream to the party. each serving of ice-cream is 1 6 quart. how many total servings of ice-cream does pat bring to the party? i think the bold is supposed to be 1/6. so 1 quart of ice cream = 6 servings. 6 * 3 = 18.