A. 70 B. 80 C. 90 D. 100 相关知识点: 试题来源: 解析 C。三角形内角和是 180 度,已知两个角分别是 30 度和 60 度,所以第三个角是 180 减去 30 再减去 60 等于 90 度,选 C。A、B、D 选项的角度值都不符合三角形内角和为 180 度的条件。反馈...
百度试题 结果1 题目A triangle contains angles measuring 25° and 75. What s the measure of the third angle? 相关知识点: 试题来源: 解析 third angle=180-2+75) =180-100 =80 反馈 收藏
1. A triangle with angles measuring 90°,30°and 60° is called a ___ triangle using the angle measures.2. A hexa gon has an area of 80 square inches The dimensions of the hexagon are enlarged by a scale factor of 3 to produce a new hexagon.What is the area of the e...
Thus, the invention combines the functions of a conventional protractor and a conventional triangle ruler to facilitate drawing a variety of different angles of lines.KUN-MENG LIN
No. The sum of the inner angles in a triangle is always 180 degrees, and a reflex angle has a measurement greater than 180° but less than 360°. Reflex angles are thus impossible for a triangle to have. Why is it called a reflex angle?
A triangle has angles measuring 30 degrees, 60 degrees, and 90 degrees. The side opposite the 30-degree angle is 5 cm. What is the length of the hypotenuse? A. 10 cm B. 8 cm C. 6 cm D. 7 cm 相关知识点: 试题来源: 解析 A。在 30°、60°、90°的直角三角形中,30°角所对的...
is a tool that measures angles. It consists of a straight edge and an arc with progressively larger degree marks. To measure an angle with a protractor, place the vertex in the small circle in the middle of the straight edge. Thevertexof a triangle is where two sides of the triangle ...
Device for measuring lengths or angles 1. Length or angle measuring device for measuring the relative displacement of two objects (3, 4; 32), in which the graduation (2) of a graduation support (1) which is connected to one object (4) is scanned by a scanning plate (8) of a s......
Since ∠ BMC is a central angle with the intercepted arc BC, its measure is also 80°. Notice that angles ∠ B, ∠ C, and ∠ M form atriangle. Remember that the sum of the angles in a triangle is equal to 180°. Thus, we can find the value of x, the m ∠ B, by subtractin...
Measure triangle hypotenuse and angles Auto-mark center, thirds or golden ratio Precise moving, resizing and flipping with keyboard shortcuts Fully portable with no installation needed Screen Ruler requires Windows 7 or newer and .NET Framework 4.8 or higher. ...