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Which math sentence can be used to determine if the triangle is a right triangle?

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp