ELet [ABC] denote the area of triangle ABC⋅[AED]=[BEC],so [ABD]=[AED]+[AEB]=[BEC]+[AEB]=[, since triangles ABD and ABC share a base, they also have the same height and thus (AB)∥(CD) and △AEB\backsim△CED with a ratio of 3:4. AE-3/7*AC, so AE-3/7*14-6(E...
usingnamespacestd; usingll =longlong; intX1,X2,X3,X4,Y1,Y2,Y3,Y4; intcros(intx1,inty1,intx2,inty2){//叉积计算 returnx1 * y2 - y1 * x2; } intmain(){ // freopen("text.in","r",stdin); // freopen("text.out","w",stdout); ios::sync_with_stdio(0),cout.tie(0),c...
网络凸四边形 网络释义 1. 凸四边形 初中数学 中英文_百度知道 ... 四边形 quadrilateral凸四边形convex quadrilateral对角线 diagonal ... zhidao.baidu.com|基于5个网页 例句
Using tools of parallel projective transformation and analytic geometry, we derived several theorems including the proof of the existence of circumscribed ellipses of convex quadrilaterals, the properties of its minimal coverage area, and locus center, respectively. This simple approach lays a solid ...
结果1 题目 Convex quadrilateral ABCD has AB=9 and CD=12. Diagonals AC and BD intersect at E, AC=14, and △AED and △BEC have equal areas. What is AE?( ) A. 92 B. 5011 C. 214 D. 173 E. 6 相关知识点: 试题来源: 解析 E N/A. 反馈 收藏 ...
【题目】Convex quadrilateral ABCD has AB=9 and$$ C D = 1 2 $$2. Diagonals A C and BD intersect at E,$$ A C = 1 4 $$14, and △AED and △BE C have equal areas.What is AE?( ) A.$$ \frac { 9 } { 2 } $$ B.$$ \frac { 5 0 } { 1 1 } $$ C.$$ \fra...
Learn what concave and convex quadrilaterals are. See the properties of convex and concave quadrilaterals and find examples of each, such as...
How is a rectangle a convex quadrilateral? What is the difference between concave and convex quadrilaterals? What shape has 3 pairs of parallel sides? What is true about a parallelogram? How do you prove a quadrilateral is a parallelogram when you are given the vertices?
convex quadrilateral ceathairshleasán dronnach plano-convex lens lionsa plánadhronnach convex set tacar dronnach excessive convexity ródhronnacht concavo-convex lens lionsa cuasdronnach 更多(+12) 添加示例 在上下文、翻译记忆库中将“convex"翻译成 爱尔兰文 变形 干 convex profile próifí...
ABCD is a convex quadrilateral with area 1. The lines AD, BC meet at X. The midpoints of the diagonals AC and BD are Y and Z. Find the area of the triangle XYZ.相关知识点: 试题来源: 解析 1/4 1. **设定坐标系**:将交点 X 设为原点 O(0, 0)。将 AD 和 BC 分别作为两条过...