0公式与定理：
垂直的等价公式 正弦定理 余弦定理 塞瓦定理 梅涅劳斯定理 中线长定理 角平分线长定理 托勒密定理 海伦公式 圆内接四边形面积公式 费马点 三角形的五心
直线型
1.In triangle ABC, AB=13, BC=14,崔天琪田丹stronger and AC=15. Let D denokink comte the midpoint of B¯¯C¯
andshoots
let E denote the interction of
novel是什么意思
¯make it happenkaiba>extremeB¯C¯
with the bictor of angle BAC. Which of the
following is clost to the area of the triangle ADE? (A)2 (B)2.5 (C)3 (D)3.5 (E)4
neutrogena2.A round table has radius 4. Six rectangular place mats are placed on the table. Each place mat has width 1 and length 也许的英文x as shown. Then are positioned so that each mat has two corners on the edge of the table, the two corners being end points of the same side of length x. Further, the mats are positioned so that the inner corners each touch an inner corner of an adjacent mat. What is x?
