Geometric Transformation is a powerful tool in Geometry. We look at one such transformation: Spiral Similarity.

## Watch video

## Try these Spiral Similarity problems. Send answers to helpdesk@cheenta.com

**Problem 1:** Suppose O = (0, 0), A = (2, 0) and B = (0, 2). Let T be the spiral similarity that sends A to B (center of T is O). What is the angle of spiral similarity? What is the dilation coefficient?

**Problem 2:** Can you rigorously prove the claim made at the end of the video?

**Problem 3:** Revisit the spiral similarity T described in problem 1. This can be realized by multiplying a complex number to A. What is that complex number?

Also try the problems related to Cyclic Quadrilaterals.

You may also click the link to learn its application:- https://www.youtube.com/watch?v=8o8AAWt960o