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...
Surveying means and method are shown for measuring the angles of a triangle one corner of which is on an unstable platform. An optical system establishes a base line, which will move parallel to itself in response to movement of the platform without altering any of the angles of the triangle...
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...
Aprotractoris 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 ...
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...
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?
this ruler offers a range of measurements to suit various woodworking tasks. The magnetic feature ensures that the ruler stays securely in place, allowing for precise measurements and easy handling. Whether you're measuring angles, marking dovetail joints, or creating intricate woodworking designs, thi...
Measure from the tip of your chin to below your ear at the point at which your jaw angles upwards. Of course, you have a jaw on both sides of your face, so multiply that number by two to get your jawline length.Step 5: Measure Your Face Length...
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......