Pressure angle of Vex 10 tooth gear?

Does anyone know the pressure angle of Vex 10DP gears, specifically # 217-8036?

They list the pressure angle of their 20DP gears (14.5 degrees) and 32 DP (20 degrees) but not the 10 DP.

Pressure angle: 20°. Says so right there on the engineering drawing.

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