Explain how to determine that you have constructed an accurate copy of an angle

You have determined that you have constructed an accurate copy of an angle because if you just draw a ray, and measure the angle of the original angle, use that same compass setting and put it on the vertex of the ray that you just drew. Make an arc that intersects the ray. At that intersection point that you just made, draw another arc with that same compass setting, through the other arc, making intersecting lines. At that final intersection point, that's where you draw your line through. Now you have constructed an accurate copy of an acute angle.

1. If it is intersection then it SHOULD be included in both the sets right? Now we know that odd numbers from 1-100 but the second set are multiples of 5 from 50-150! So we mainly need to look for common numbers which are ODD and are a MULTIPLE OF 5 BETWEEN 50 - 100!! So A={51,53,57,59,6199} B={55,60,65,7095} [We stop till 100 because set A has no such element] So what is A ∩ B here? A ∩ B = {All odd numbers and multiples of 5 between 50 - 100}