A. necessary but not sufficient B. sufficient but not necessary C. both necessary and sufficient D. neither necessary nor sufficient 相关知识点: 试题来源: 解析 C。本题考查几何证明中的充分必要条件关系。一个三角形有三条相等的边必然是等边三角形,这是既充分又必要的条件。A 选项“必要但不充分”不...
A. equilateral triangle B. right triangle C. isosceles triangle D. scalene triangle 相关知识点: 试题来源: 解析 C。本题考查三角形的分类。如果一个三角形有两条边相等,那么它被称为等腰三角形。A 选项是等边三角形,三边相等;B 选项是直角三角形;D 选项是不等边三角形。反馈...
A. equilateral triangle B. isosceles triangle C. right triangle D. scalene triangle 相关知识点: 试题来源: 解析 B。有两条边相等的三角形叫等腰三角形,即 isosceles triangle。A 选项 equilateral triangle 是等边三角形,三边相等;C 选项 right triangle 是直角三角形;D 选项 scalene triangle 是不等边三角...
If A is the area an equilateral triangle of height h , then (a)A=sqrt(3)\ h^2 (b) sqrt(3)A=h (c)sqrt(3)A=h^2 (d) 3A=h^2
If an equithagorean triangle is an equilateral triangle in which the sum of the cubes of two sides is equal to the square of the third side, what is the perimeter of an equithagorean triangle( ). A. 0.5 B. 1.5 C. 4.5 D. 6 相关知识点: 试题来源: 解析 B If each side is s,...
An equilateral triangle and a regular hexagon have equal perimeters. If the area of the triangle is 4, what is the area of the hexagon?( ). A. 4 B. 5 C. 6 D. 4√3 E. 6√3 相关知识点: 试题来源: 解析 C 一个等边三角形与一个正六边形等周长.若三角形面积为4,则六边形面积是...
is called a regular or an equilateral triangle.Complete the statements.ci a) ∠ A = ∠ B |=∠ C ; A B ⊥ CD ; AD=DB b) Any equilateral triangle is an isosceles triangle.M c) An equilateral triangle has 3 lines of symmetry.A Bd) D C is the height of the equilateral triangle....
Since △WAT is an equilateral triangle with a side of length \sqrt{13} , its height will be \dfrac{\sqrt{3}}{2} (√{13). The area of △WAT is thus, \dfrac{1}{2} \dfrac{\sqrt{3}}{2} 13= \dfrac{13}{4}\sqrt{3} . It is also possible to use the formula for the area...
结果1 题目 3. An equilateral triangle has a side length of 20. If a square has the same perimeter as this triangle, the are a of the square is(A)25(B)400(C)225(D)60(E)100 相关知识点: 试题来源: 解析 3.C 反馈 收藏 ...
百度试题 结果1 题目An equilateral triangle and a regular hexagon have equal perimeters. If the area of the triangle is 4, what is the area of the hexagon?( ). A. 4B. 5C. 6D. 4√3E. 6√3相关知识点: 试题来源: 解析 C 反馈 收藏 ...