设这个角为a ,则它的余角是 90 - a,它的补角是 180 - a,根据题意有：90 - a = 1/4( 180 - a) + 1090 - a = 45 - 0.25a + 10- a + 0.25a = 55 - 90- 0.75a = - 35a = 140/3 = 46又2/3（度）(2/3)° = 2/3 × 60′ = 4...
