Outside the Box Geometry

# A preview of "Mastering Triangles"

Above, a line cuts across two adjacent rectangles.

How many right triangles can you find in this diagram?

In the diagram below, two chords that are diameters of a circle intersect at right angles. What is the area of the circle?

In isosceles $$\triangle{XYZ},$$ line segment $$YW$$ is which of the following?

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