(1) The measuring range (i.e. the maximum weighing range) of the platform scale weighing goods in the market is generally 16kg, and the scales on the indicator plate are even. If you put 12kg of vegetables on the scale, turn the pointer on the indicator plate to 270; If 4 kilograms of vegetables are placed on the scale, the pointer turns 90 degrees; If the pointer rotates, because 12kg rotates by 270, the degree of rotation per kilogram is 180/ 12=22.5 degrees; 180/22.5 = 8kg (2) If ∠ 1-∠ 2 = 3,