The triangle ABC has angles of 30 degrees, 60 degrees and ___. A. 70 degrees B. 80 degrees C. 90 degrees D. 100 degrees 相关知识点: 试题来源: 解析 C。本题考查三角形内角和为 180 度的知识点。已知三角形的两个角分别是 30 度和 60 度,那么第三个角是 180 - 30 - 60 = 90 度。
coordinates, and so its reflection, with the coordinates swapped, will also have non−negative x and y coordinates. (B): The triangles have the same area, since △ABC and △A′B′C′ are the same tiangle (congruent). More formally, we can say that area is invariant under reflection....
Question: Triangle ABC is right-angled. Triangle DEF is isosceles. They have the same perimeter. Calculate the area of triangle DEF. Area of a Triangle: We determine the area of a triangle by identifying the base and height. In addition, the...
[translate] ac. With the notation for the angles of triangle ABC as above, use a. and b. to show that c. 与记法为三角ABC角度如上所述,使用a。 并且b。 显示那[translate]
The side AB is the shortest of the three sides of the triangle ABC. 边AB是三角形ABC三个边中最短的边。 2、三角铁;三角板,三角尺 [C] Triangle is a kind of instrument. 三角铁是一种乐器。 3、三角关系 [C] What a complicated triangle!
What is the largest angle in triangle ABC?(1) The sum of angles A and B is 70 degrees.(2) Angle C is 110 degrees. A:Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B:Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. ...
An equilateral triangle is shown below. What is the value of y, the length of one side? Let \triangle ABC be an equilateral triangle inscribed in a circle and P be any point on arc AC. Show that AP + PC= PB. Show that an equilateral triangle gives the most area for a fixed perime...
Activity: Draw 3scalene triangleson a sheet of paper as shown. Let us consider fig. (i). In ∆ABC, AC is the longest side and AB is the shortest. We observe that ∠B is the largest in measure and ∠C is the smallest. Similarly, in ∆XYZ, XY is the largest side and XZ is...
asina=bsinb=csinc=D.Thelaw of cosinesdraws a relationship between the squares of a side length and their opposite angles:a2=b2+c2− 2bccosAb2=a2+c2− 2accosBc2=a2+b2− 2abcosC.The law oftangentsdraws a relationship between two sides and their opposite angles, which can be used ...
Area of a triangle is the region covered by its three sides in a plane. Area of a triangle is equal to half of product of its base and height. Find the area using heron's formulas and SAS condition, with examples at BYJU'S.