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Question:

The base of a right triangle is 1 foot, and the interior angles are 45-45-90. What is its area?

A 0.5 foot squared
Explaination

If you draw out this triangle, you'll see that it is a right isosceles triangle with two equal sides of 1 foot. This means that the base is 1 foot and the height is 1 foot. Using the formula for area of triangles, $2053_w68_h37.png$ , we find the area is 0.5 feet squared.