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you take the center of a circle draw a straight line up ( radius ) and make it a 45 degrees by drawing another line forming
You are finding the mean of the set of numbers.
2 sets of parallel lines make up a square. One set is composed of vertical lines, the other of horizontal ones.
Draw a construction line (to be deleted) perpendicular to the lines you wish to draw. Lay one edge of the set-square (not the hypotenuse) along this line and draw one line using the other non-hypotenuse edge. Repeat this further up the construction line. Delete the construction line.
A red hypergiant star could have a radius of up to 2000 solar radii or more, where one solar radius is the radius of our sun. If at the centre of our solarsystem, a hypergiant could extend out as far as Jupiter or more.