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少儿英语 数学课英语口语
A:Can you tell me how many kinds of triangles can be divided according to their angles?
A:你能告诉我三角形按角的大小可以分成哪几类吗?
B:Obtuse triangles，acute triangles and right triangles.
B:钝角三角形、锐角三角形和直角三角形。（广州汉普森外教英语）
A:Yes. Angles that are less than 90° are called acute angles. Angles that are more than 90° and less than 180° are called obtuse angles.
A:是的。比90°小的角是锐角。比90°大而比180°小的角是钝角。
B:A right triangle contains a 90° angle indicated by a small square.
B:直角三角形含有一个直角，用一个小正方形表示。
A:How many kinds of triangles can be divided according to their sides?
A:三角形按边的长短可以分成哪几类?
B:Scalene triangles，isosceles triangles and equilateral triangles.
B:不等边三角形、等腰三角形和等边三角形。
A:An isosceles triangle has two sides the same length. Its two base angles are equal.。
A:等腰三角形有两条边长度相等，它的两个底角相等。
B:An equilateral triangle has all its sides equal. The interior angles of an equilateral triangle are all 60°.
B:一个等边三角形所有的边都相等。等边三角形的内角都是60°.去看看:少儿英语表演节目
标签:少儿英语 数学课英语口语