单选题If the measures of the angles of a triangle are in the ratio of 2：3：4, what is the measure of the smallest angle of the triangle?A20B25C30D40E45
单选题
If the measures of the angles of a triangle are in the ratio of 2：3：4, what is the measure of the smallest angle of the triangle?
A
20
B
25
C
30
D
40
E
45
参考解析
解析：
Let 2x, 3x, and 4x represent the measures of the three angles. 2x+3x+4x=180, x=20. Hence 2x=40.
Let 2x, 3x, and 4x represent the measures of the three angles. 2x+3x+4x=180, x=20. Hence 2x=40.
相关考题：
下列程序对加号进行了重载,划线部分的语句是______。 include include class 下列程序对加号进行了重载，划线部分的语句是______。include＜iostream.h＞include＜math.h＞class Triangle{int x,y,z;double area;public:Triangle(int i,int j,int k){double s;x=i;y=j;z=k;s=(x+y+z)/2.0;area=sqrt(s*(s-x)*(s-y)*(s-z));}void disparea( ){cout＜＜"Area="＜＜area＜＜endl;}friend double operator+(Triangle tl,Triangle t2){______}};void main( ){Triangle tl(3,4,5),t2(5,12,13);double s;cout＜＜"tl:";t1. disparea( );cout＜＜"t2:";t2. disparea( );s=t1+t2:cout＜＜"总面积：="＜＜s＜＜endl;}
The basic unit of measure in a computer system is the(72). It is the smallest unit in computing. There are some other measures in a computer, such as Kilobyte, Megabyte, Gigabyte and so on.A．KilobyteB．BitC．GigabyteD．Megabyte
（ 12 ） “ 图形 ” 类 Shape 中定义了纯虚函数 CalArea() ，“ 三角形 ” 类 Triangle 继承了类Shape ，请 将Triangle 类中的 CalArea 函数补充完整。class Shape{public:virtual int CalArea()=0;}class Triangle: public Shape{public:Triangle{int s, int h}: side(s),height(h) {}【 12 】 { return side*height/2 ; }private:int side;int height;};
The classic semantic triangle fails to answer() A what precisely the link between the symbol and the concept isB what symbol/form. refers toC what referent refers toD what thought/reference refers to
● The basic unit of measure in a computer system is the（72）. It is the smallest unit in computing. There are some other measures in a computer, such as Kilobyte, Megabyte, Gigabyte and so on.（72）A．KilobyteB．BitC．GigabyteD．Megabyte
When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation ________．A.The objects lie in a straight lineB.The vessel is inside of a triangle formed by the objectsC.The vessel is outside of a triangle formed by the objectsD.A circle will pass through your position and the three objects
In the navigational triangle，the angle at the elevated pole is the ______．A.meridian angleB.altitudeC.right ascensionD.azimuth angle
多选题Triangle PQR is isosceles and ∠PQR measures 50°. Which of the following could be the measure of ∠PRQ? (Indicate all of the answer choices that apply.)A60°B65°C80°D100°E130°
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
单选题An isosceles triangle has one angle with a measure greater than 95° and another with a measure of x°. Which of the following must be true?Ax 85Bx = 85Cx =42.5Dx 42.5Ex 42.5
单选题The ratio of r to s is 3 to 4. The ratio of s to t is 2 to 9. What is the ratio of r to t?A1 to 3B1 to 6C2 to 9D3to10E4 to 5
问答题In isosceles triangle ABC what is the value of∠C? (1) The measure of∠B is 47. (2) The measure of∠A is 96.
单选题When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.AThe objects lie in a straight lineBThe vessel is inside of a triangle formed by the objectsCThe vessel is outside of a triangle formed by the objectsDA circle will pass through your position and the three objects
单选题What is required in addition to the heat，fuel，and oxygen of the fire triangle to have a fire?（）AElectricityBChain reactionCPressureDSmoke
单选题If the ratio of the area of a sector to the area of the circle is 2：3. what is the ratio of the length of the arc in the sector to the circumference of the circle?A3/2B2/3C4/9D1/4E9/4
单选题Which statement about an estimated position is TRUE?（）AIt is more reliable than a fix based on radar bearingsBIt may be based on a single LOP or questionable dataCWhen a 3-LOP fix plots in a triangle，the center of the triangle is the estimated positionDIt is usually based on soundings
单选题In any right triangle, the acute angles are ______.AEqualBAdjacent anglesCVertical anglesDComplementary anglesESupplementary angles
单选题The vertical distance between G and M is used as a measure of（）.Astability at all angles of inclinationBinitial stabilityCstability at angles less than the limit of positive stabilityDstability at angles less than the downflooding angle
单选题If the measures of the angles of a triangle are in the ratio of 2：3：4, what is the measure of the smallest angle of the triangle?A20B25C30D40E45
单选题In the navigational triangle，the angle at the elevated pole is the（）.Ameridian angleBaltitudeCright ascensionDazimuth angle
单选题If the measures of the angles of a triangle are in the ratio of 3: 4: 5, what is the measure of the smallest angle of the triangle?A25B30C45D60E75
单选题The three interior angles of a triangle have measures of a°, a°, and b°. If b = 80, what is the value of a?A30B40C50D60E100