I'm thinking quadrants would be the answer.
I assume that when you say "circumference", you really mean "perimeter" of the octagon. I also assume that by saying, "diameter", you really refer to the widest distance between two points on the octagon. An octagon has 8 sides, so if you divide 24 by 8, then you have 3 units of length per side. Then if you were to draw lines from the center of the octagon out to the ends of the segments of the perimeter, then those lines would be 45 degrees apart from each other. In order to find the "diameter", you need to find the length of one of those lines drawn from the center of the octagon, then double it. To do this, you need to perform some trigonometry. To perform the trig, the easiest thing would be to use a right triangle. By drawing a line from the center of the octagon, perpendicular (at a right angle) to one of the outside segments of the octagon, you bisect the 45 degree angle created by the two lines on either side of it. So then you have created a right triangle inside of the octagon, with a 1.5 unit long side, and an opposing 22.5 degree angle. In this case, you want to find out the length of the longest side of this triangle, which is the hypotenuse. So, the sine of the angle 22.5 degrees is equal to 1.5 units divided by the length of the hypotenuse. If you solve for the hypotenuse, you get 3.92 units, rounded. Double this gives you 7.84 units across the octagon.
cooresponding angles are created where a transversal crosses other (usually parallel) lines. the cooresponding angles are the ones at the same location at each intersection.
Two lines that intersect will create2 pairs of equal angles and if the lines are perpendicular the angles created will be right angles
Pascal's Triangle A triangle of numbers in which a row represents the coefficients of the binomial series. The triangle is bordered by ones on the right and left sides, and each interior entry is the sum of the two entries above. Similar to modern day Sudoku.
A right angle.
A right angle.
One, two or four right angles, depending upon whether one or both line segments continue beyond the point of intersection.
Right angles of 90 degrees are created when perpendicular lines intersect each other.
A right angle.
A triangle can have one angle made up of perpendicular lines. That would be called a right triangle. A triangle cannot have more than one angle made up of perpendicular lines however. To see why, remember that an angle created by two perpendicular lines is 90 degrees and a triangle is made up of three angles that sum to 180 degrees. If two angles were 90 degrees the third angle would have to be 0 degrees, in which case the shape is no longer a triangle.
The Einstein Intersection was created in 1967.
Intersection for the Arts was created in 1965.
Intersection - film - was created on 1994-01-21.
Intersection capacity utilization was created in 2000.
Point Perpendicular Light was created in 1899.
Triangles by definition have three sides; a two-sided triangle is impossible. In fact, no closed geometrical figure can be created out of only two straight lines. An angle is not closed. A vesica piscis is not made of straight lines. (This is the lens-like shape created in the intersection of two circles.)