Equation Of A Tangent To A Circle

The video tutorial explains the concept of tangents to circles, emphasizing that tangents are always perpendicular to the radius. It covers the use of equations for circles, straight lines, and tangents, and provides a detailed example of finding the equation of a tangent. Viewers are encouraged to solve a practice problem and engage with the content by liking, subscribing, and commenting.

What is the relationship between a tangent and the radius of a circle?

• They are the same line.

• They intersect at two points.

• They are parallel.

• They are perpendicular.

If the gradient of the radius is -4/3, what is the gradient of the tangent?

• -3/4

• -4/3

• 3/4

• 4/3

Which of the following is used to find the equation of a tangent?

• The center of the circle and the point of tangency

• The area of the circle

• The circumference of the circle

• The diameter of the circle

What is the equation of the tangent if the gradient is 3/4 and the y-intercept is -6.5?

• y = 3/4x + 6.5

• y = 3/4x - 6.5

• y = -3/4x + 6.5

• y = -3/4x - 6.5

What should you do if you have questions about tangents to circles?

• Comment below the video

• Ask a friend

• Search for another video

• Ignore them