Staedtler Mars Adjustable Triangle 6″ Made in USA
By multiplying the slope angle and universal triangle gradient angle horizontal distance, slope, slope is measurably easy, highest of up to 45 tilt angle is required. I know the inclination angle and the swash surface horizontal distance, slope distance will be calculated by multiplying the horizontal distance and scale index of the slope. all angles can be obtained in the theorem of angle triangle. Material: 3mm: thick acrylic
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