Answer:
To be honest, if you’re preparing for your IGCSEs, you should really know how to use a ruler, but I’ll explain it anyway.
A ruler is a flat object, usually rectangular, with markings along one or more of its straight edges.
These markings show us how long something is. It can only be used to measure other straight lines. If you want to measure something, hold the ruler against it, aligning the start of the edge of the object with the 0 on the ruler, and read off the ruler how long it is.
Explanation:
