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Right triangle: One of the three angles is a right Angle. The other two are acute angles.

直角三角形：有一个角是直角，有两个角是锐角。

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Methods in our 54 cases of primary acute angle-closure glaucoma were analyzed retrospectively, giving patients a reasonable and effective treatment means nursing measure.

方法对本院54例原发性急性闭角型青光眼患者的临床资料进行回顾性分析，给予患者合理的治疗手段及有效的护理措施。

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Burnley started strongly in the second half, Robbie Blake forcing a good low diving save from Cudicini, and later hitting a post with a rebound from an acute angle after the goalkeeper fumbled a free-kick.

BBC: Tottenham Hotspur 5-0 Burnley

Villa led 2-0 at the break through a Richard Dunne header and a finish from an acute angle by Darren Bent.

BBC: Arsenal 3-2 Aston Villa

Kevin Campbell threatened for the Baggies, stinging Jamie Ashdown's fingers with a shot from an acute angle, while Aliou Cisse drove wide for Pompey from 25 yards.

BBC: SPORT | Football | Premiership | West Brom 2-0 Portsmouth