A. **180度**:正确。这是三角形的基本性质,可通过平行线定理或拼接法证明。 B. 360度:错误。360度通常是四边形的内角和(如矩形)。 C. 90度:错误。单个直角为90度,但三个内角总和需更大。 D. 120度:错误。仅当三个内角均相等时(如等边三角形),每个角为60度,总和仍然为180度。 因此,正确答案为A。
A. A triangle with three different angles. B. A triangle with three equal sides and three equal angles. C. A triangle with only one right angle. D. A triangle with two E. qual sides. 相关知识点: 试题来源: 解析 B。中文解析:等边三角形是三条边相等且三个角也相等的三角形,A 选项是一...
Two right angles make up a straight angle. Since the measure of a straight angle is 180°, it is one-half of the whole turn of a circle.Reflex AngleA reflex angle is an angle whose measure is greater than 180° but less than 360°....
An angle is a geometrical figure formed when two rays meet at a common point called vertex. Let's know about angles, their parts, types, construction using examples!
What do all the angles of a triangle add up to? Sum of angles in a triangle is 180 Can a triangle have three right angles? A triangle can never have three right angles Trending Questions How many square feet equals one square?How many acres in the US are landfills?How many degrees are...
If a triangle has angles measuring 30 degrees, 60 degrees, and x degrees, what is the value of x?相关知识点: 试题来源: 解析 90 根据三角形内角和定理,任意三角形的三个内角之和必须等于180度。题目中已给出的两个角分别是30度和60度,设第三个角为x度。计算步骤如下:1. 将已知的两个角度相加:...
If a triangle has angles measuring 30°, 60°, and 90°, what type of triangle is it?a) Equilateralb) Isoscelesc) Scalened) Right 相关知识点: 试题来源: 解析 d) Right 1. **分析选项a(等边三角形)**:等边三角形的三个角均为60°,而题目中存在30°和90°,因此a错误。 2. **分析选项...
39. What is the sum of the interior angles of a triangle?360 Degrees 180 Degrees 90 Degrees 0 DegreeAnswerThe correct answer is: B) 180 DegreesExplanationThe sum of a triangle's interior angles is always 180 degrees. This trait applies to all triangles, regardless of size or shape. The ...
What tipe of triangle is a sealene? The type of triangle that is a scalene has 3 sides of different lengths and 3 interior angles of different sizes that add up to 180 degrees. If two angles in a triangle are congruent to two angles in another triangle then the angles are also congruen...
Degrees that the angles in a triangle add up to Angles in an acute triangle Skills Practiced Distinguishing differences - compare and contrast main topics from the lesson, such as acute and obtuse triangles Information recall - remember what you know about the different types of triangles In...