The Pyraminx is a Rubik's cube-type toy in the shape of a triangle-based pyramid. Every edge of the Pyraminx below is 15cm long. The pyramid's height is h=12.2m. The triangle drawn with dashed lines is a right triangle.
What is the radius r of the base of the pyramid?
Round your answer to the nearest tenth of a centimeter.
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Square the radius of the circle and multiply the result by "pi" (the symbol π), or approximately 3.14. Multiply this result by the cylinder's height to get its volume. So if the base of your cylinder has a radius of 3 cm, its area is 32 × 3.14, or 28.26 square centimeters.
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