Shulba Sutras are like a special set of instructions that were written a very long time ago by wise people in India who wanted to build things like houses, temples, and altars for their gods.
These instructions tell you how to measure things really accurately, like the length of a rope or the width of a square. They also tell you how to make perfect shapes, like circles and rectangles, using only sticks and string.
The shulba sutras are important because they help you make strong and sturdy structures that look beautiful too. People have been using these instructions for thousands of years and they still work just as well today.