# Tangents and Normals in Geometry

### Tangents and Normals in Geometry

When studying geometry, you will come across the terms tangent and normal. It is important to understand the difference between the two, as they are used in different ways. In this blog post, we will explain what tangents and normals are, and how they are used in geometry.

A tangent is a line that touches a curve at one point but does not intersect it. The point at which the line touches the curve is called the point of tangency. Tangents can be used to find the slope of a curve at a certain point.

A normal is a line that intersects a curve at two points. The angle between the normal and the curve is always 90 degrees. Normals can be used to find the equation of a curve at a certain point.

Tangents and normals are two important concepts in geometry. Tangents are used to find the slope of a curve at a certain point, while normals are used to find the equation of a curve at a certain point. Understanding the difference between these two concepts is essential for success in geometry.

## FAQ

### How do you find normals and tangents?

There are a few different ways to find normals and tangents. One way is to use the Pythagorean theorem. Another way is to use the slope formula. Finally, you can also use a graphing calculator to find these values.

### Why do we use tangent and normal?

Tangent and normal are used in order to find the rate of change of a function at a given point. Tangent is the derivative of the function at a given point, while normal is the second derivative of the function at a given point. These values are important in order to understand how a function behaves near a certain point.

### What does normal mean in geometry?

In geometry, the word "normal" usually refers to a line that is perpendicular to another line. In other words, a normal is a line that is at a 90 degree angle to another line. This word can also refer to a vector that is perpendicular to a given surface.

### What is tangent and normal of a circle?

The tangent of a circle is a line that touches the circle at only one point. The normal of a circle is a line that is perpendicular to the tangent line at the point of tangency.