This document provides instructions for three 2D geometric transformation exercises: 1) Rotate squares around their centroids clockwise as a single unit, 2) Rotate triangles in a star shape in opposite directions around the star's centroid and the star around an outer point, 3) Generate a wave graph by plotting random values against time with a fixed delay between values.

1. Exercises for Two Dimensional Geometric Transformations
Author: Kasun Ranga Wijeweera
Email: krw19870829@gmail.com
Date: 20150521
1) Following figure shows a snapshot of your program. Each of the squares should rotate
around their centroids in clockwise order. And the system should stay as a single unit. Design
and implement an appropriate program.
2) A star is created using two similar triangles. The triangles in the star shown in following
figure should rotate in opposite directions around the centroid of the star. And meanwhile the
star should rotate around an outer point.

2. 3) Random values in the range from 0 to 100 are generated with fixed amount of delay between
them. Generate a wave by considering time for the x-axis and random values for the y-axis.
(E.g. ECG wave)