The image shows a black and white drawing of a triangular prism with numbers and text written on it.
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The image shows a black and white drawing of a triangular prism with numbers and text written on it. The prism is a hypotenuse, which is a type of circle that is used to measure the angle of the sun's rays. The numbers on the prism indicate the direction of the light passing through it, and the text provides further information about the angle.
