acute angle

Angles of less than 90 degrees are called acute angles.

小90角叫锐角。

In contrast to prominent ear with underdeveloped antihelix fold, over-convex-antihelix ear reveals a sharp acute angle of antihelix and over-concaved scapha.

摘要相对“朝风耳”对耳轮过平坦外翻，对耳轮过前凸则是厉对耳轮前凸及舟状部内陷。

The characteristic of hyphae are regular width and septation with typical branching in acute angle (about 45 degrees) in PAS stain.

病理切片经由PAS染色清楚可见麴菌菌丝，其具有隔，呈锐角状，约45角，为其特徵。