填空题One side of square A is 1/2 the length of the diagonal of square B. If the area of square A is 16, what is the area of square B?a + b- 4z = 500a +b + 6z= 1200____
填空题
One side of square A is 1/2 the length of the diagonal of square B. If the area of square A is 16, what is the area of square B?a + b- 4z = 500a +b + 6z= 1200____
参考解析
解析：
如果正方形A为16，那么它的边长为4，因为B的对角线是A的边长的两倍，所以B的对角线为8，设B的边长为b，根据勾股定理，b2 + b2 = 82 =64，所以32 = b2，所以B的面积为32。
如果正方形A为16，那么它的边长为4，因为B的对角线是A的边长的两倍，所以B的对角线为8，设B的边长为b，根据勾股定理，b2 + b2 = 82 =64，所以32 = b2，所以B的面积为32。
相关考题：
试题七（共 15 分）阅读下列说明、图和Java 代码，回答问题1 至问题3，将解答写在答题纸的对应栏内。[说明]已知四个类之间的关系如图 7-1 所示，分别对每个类的方法进行编号，例如 Shape的 perimeter()为 1 号，表示为“1:perimeter()” ，Rectangle 类的 perimeter()为 2 号，表示为“2:perimeter()” ，依此类推，其中，每个类的 perimeter方法签名相同。[Java 代码]Triangle tr = new Triangle();Square sq = new Square();Shape sh = tr;[问题 1] 关于上述 Java代码中 sh 和 tr 的以下叙述中，哪两个是正确的（写出编号） 。① sh 和 tr 分别引用同一个对象；② sh 和 tr 分别引用同一类型的不同的对象；③ sh 和 tr 分别引用不同类型的不同对象；④ sh 和 tr 分别引用同一个对象的不同拷贝；⑤ sh 和 tr 所引用的内存空间是相同的。[问题 2] 写出下面消息对应的方法编号（如果该消息错误或者没有对应的方法调用，请填写“无” ） 。tr.height() （1）sh.perimeter() （2）sq.height() （3）sq.perimeter() （4）sh.height() （5）tr.perimeter() （6）[问题 3] 下列赋值语句中哪两个是合法的（写出合法赋值语句的编号） 。① sq = sh; ② sh = tr; ③ tr = sq; ④ sq = tr; ⑤ sh = sq;
试题五（共 15 分）阅读下列说明、图和C++代码，回答问题1 至问题3，将解答写在答题纸的对应栏内。[说明]已知四个类之间的关系如图 5-1 所示，分别对每个类的方法进行编号，例如 Shape的 perimeter()方法为 1 号，表示为“1:perimeter()” ，Rectangle 类的 perimeter()为2号，表示为“2:perimeter()” ，依此类推，其中，每个类的 perimeter方法都为虚函数且方法签名相同。[C++代码]Triangle *tr = new Triangle();Square *sq = new Square();Shape *sh = tr;[问题 1] 关于上述 C++代码中 sh 和 tr 的以下叙述中，哪两个是正确的（写出编号） 。① sh 和 tr 分别引用同一个对象；② sh 和 tr 分别引用同一类型的不同的对象；③ sh 和 tr 分别引用不同类型的不同对象；④ sh 和 tr 分别引用同一个对象的不同拷贝；⑤ sh 和 tr 所引用的内存空间是相同的。[问题 2] 写出下面消息对应的方法编号（如果该消息错误或者没有对应的方法调用，请填写“无” ） 。tr-height() （1）sh-perimeter() （2）sq-height() （3）sq-perimeter() （4）sh-height() （5）tr-perimeter() （6）[问题 3] 不考虑内存释放问题，下列赋值语句中哪两个是合法的（写出合法赋值语句的编号） 。① sq = sh; ② sh = tr; ③ tr = sq; ④ sq = tr; ⑤ sh = sq;
Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a ______.A.red triangle with the letter RB.white triangle with the letters RGC.green square with the letter GD.white square with the letters GR
A tow astern is veering from side to side on its towline．The best way of controlling the action is to ______．A.Trim the tow by the bowB.Trim the tow by the sternC.List the tow to windwardD.Adjust the length of the towing bridle
函数ListDelete_sq实现顺序表删除算法，请在空格处将算法补充完整。int ListDelete_sq(Sqlist *L,int i){ int k; if(i1||iL-length) return ERROR;for(k=i-1;klength-1;k++) L-slist[k]= （1） ; （2） ; return OK;}
Definition of Length：（）A、The length shall be taken as 96% of the total lengthB、The length shall be taken as 96% of the LbpC、The length shall be taken as 96% of the total length on a waterline at 85% of the least moulded depth measured from the top of the keelD、The length from the fore side of the stem to the axis of the rudder stock on that waterline
单选题The length of a rectangular kitchen floor is 3 feet more than its width, if the length of the floor is 12 feet, what is the area of the floor in square feet?A9B15C42D108E44
单选题If one pair of opposite sides of a square are increased in length by 20% and the other pair of sides are increased in length by 50%, by what percent is the area of the rectangle that results greater than the area of the original square?A10%B50%C70%D75%E80%
单选题The length of a rectangle is 5 more than the side of a square, and the width of the rectangle is 5 less than the side of the square. If the area of the square is 45, what is the area of the rectangle?A20B25C45D50E70
单选题If A (-1, 1) and B (3, -1) are the endpoints of one side of square ABCD, what is the area of the square?A12B16C20D25E36
问答题A rectangle is equal in area to a square with sides of length 12. Is the diagonal of the rectangle greater in length than 20? (1) The rectangle has a length of 16. (2) The rectangle has a width of 9.
单选题Entering from sea,a daymark on the port side of the channel would be indicated on a chart by a（）.Ared triangle with the letter RBwhite triangle with the letters RGCgreen square with the letter GDwhite square with the letter GR
多选题Definition of Length：（）AThe length shall be taken as 96% of the total lengthBThe length shall be taken as 96% of the LbpCThe length shall be taken as 96% of the total length on a waterline at 85% of the least moulded depth measured from the top of the keelDThe length from the fore side of the stem to the axis of the rudder stock on that waterline
单选题If the area of a square with sides of length 8 centimeters is equal to the area of a rectangle with a width of 4 centimeters, what is the length of the rectangle, in centimeters?A4B8C12D16E18
单选题When backing down with sternway，the pivot point of a vessel is（）.Aabout one-quarter of the vessel's length from the sternBat the bowCabout one-third of the vessel's length from the bowDaft of the propellers
单选题A list signal of one white light indicates that the vessel is （）.Aon an even keelBlisting about 1° to the side the light is displayed onClisting over 5° With the light displayed on the high sideDlisting，and the chutes should be directed to the side where the light is displayed
单选题On entering from seaward，a starboard side daymark will（）.Ashow a fixed red light if lightedBshow a Morse (A) white lightCbe square in shapeDhave an even number if numbered
单选题A tow astern is veering from side to side on its towline. The best way of controlling the action is to（）.Atrim the tow by the bowBtrim the tow by the sternClist the tow to windwardDadjust the length of the towing bridle
单选题The unit of duration of a dash in Morse Code is（）.Aone and one-half times the length of a dotBtwice the length of a dotCthree times the length of a dotDfour times the length of a dot
单选题Which of the following describes one of the apartments the speaker has seen?AA railway on one side and a lake on the other.BA busy road on one side and a lake on the other.CA busy road on one side and a railway on the other.
单选题（）measured at the midship section and taken from outside of the ship’s side shell plating on one side to the outside of ship’side shell plating on the other side.ALength overallBAfter perpendicularCAmidshipsDExtreme breadth
问答题If the square root of t is a real number, is the square root of t positive? (1) t 0 (2) t2 0
单选题When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.Afirst to the bottom of the flaming area，sweeping from side to side，and following the flames upwardBin a circular motion from the middle of the bulkhead outwardCto the top of the flaming area，sweeping from side to side，and working toward the bottomDin an up-and-down motion from one side of the bulkhead to the other
填空题函数ListDelete_sq实现顺序表删除算法，请在空格处将算法补充完整。int ListDelete_sq(Sqlist *L,int i){ int k; if(iL-length) return ERROR;for(k=i-1;klength-1;k++) L-slist[k]= （1） ; （2） ; return OK;}
单选题If an inflatable liferaft is overturned，it may be righted by（）.Afilling the stabilizers on one side with waterBreleasing the CO2 cylinderCpushing up from under one endDstanding on the inflating cylinder and pulling on the straps on the underside of the raft