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A组一、填空题 (每小题 3分 ,共 3 0分 )1 .如果三角形的两条边上的垂直平分线的交点在第三边上 ,那么这个三角形是三角形 .2 .到线段两端点的距离相等的点在 .3 .等边三角形ABC中 ,∠B ,∠C的平分线交于O ,O到点B ,C的距离为 2 3 cm ,则△ABC的周边长为cm ,面积为cm2 .4.如图
Group A First, fill in the blanks (3 points for each question, total 30 points) 1. If the intersection of the vertical bisector on the two sides of the triangle is on the third side, then the triangle is a triangle. 2. To the line two The points with equal distances in the end point are in .3. The equilateral triangle ABC, where the bisector of ∠B and ∠C is crossed by O, the distance from O to B, and C is 2 3 cm, the perimeter of △ABC is cm. The area is cm2 .4.