In a straight line, what is the first basic angle that would be obtained? (in degrees)
90∘
We first draw a straight line, to bisect it to get 90∘. The angle on a straight line is 180∘.
In the construction of a right angle, what is the first basic angle that would be obtained? (in degrees)
In order to construct a 90∘ angle, we draw a straight line first. The angle measure of a straight line is ___ (in degrees).
What is the only possible angle(in degrees) that can be created by using a straight ruler alone?