### How many lines are there in an angle?

Two lines but they can't be parallel. It would be better to say two rays that share the same endpoint form an angle. However, two intersecting lines form angles also. Two rays can form a 180 degree angle if they share the same endpoint and point in exactly the opposite directions. Two perpendicular lines can form a right or 90 degree angle.

### True or falce an angle is the space between two meeting lines?

It depends if this definition is the same as what you consider and angle. In geometry, an angle (in full, plane angle) is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. The magnitude of the angle is the "amount of rotation" that separates the two rays, and can be measured by considering the length of circular arc swept out when one ray is rotated about the vertex…

### Explain why Ab and Ba are the same line but Cd and Dc are not not the same ray?

Ab and Ba are the same line because there are no endpoints to a line. Therefore, you can reverse the order of the letters. So, Cd and Dc are not the same ray because the first letter is the endpoint. So on ray Cd, point C is the endpoint and d is a point on the line coming from the endpoint. On ray Dc, D is the endpoint.

### How is a reflection formed?

a reflection is formed when rays of light bounces off an object onto a smooth shiny surface (such that light rays are reflected off at the same angles) and reflects off it into our eyes. when the surface is rough there wouldn't be a reflection as lights rays from an object is reflected off the rough surface at different angles and does not enter our eyes

### What element is formed from uranium-238 after emission of alpha rays?

You get this answer by performing the following: Mass # Mass # 4 Atomic # Parent symbol -> Atomic # Daughter symbol + 2 He 238 234 4 92 U -> 90 Th + 2 He Both sides must equal the same thing, so if you figure out what plus 4 = 238 and what plus 2 = 92, you can figure out the element is formed through decay. The resulting element in this case…

### What is the difference between vertex and angle?

An angle can be defined as two rays or two line segments having a common end point. The endpoint becomes known as the vertex (shared endpoints). An angle occurs when two rays meet or unite at the same endpoint. An angle can be identified as ABC or CBA. You can also write this angle as B which names the vertex (common endpoint of the two rays) The vertex (in this case B) is always written…