Usually a ruler or something like a ruler. Always has a straight edge so you can easily draw straight lines/measure
Straitedge is longer
you could use it as a ruler, because it has a straitedge
Yes, it is possible to construct an angle measuring 7.5 degrees using a compass and straightedge. This can be done by first constructing a 15-degree angle, which is achievable through a combination of bisecting angles. By bisecting a 15-degree angle, you can obtain the desired 7.5-degree angle. This method relies on the principle that angle bisection is a fundamental constructible operation.