A square is a regular polygon with four interior angles, each measuring 90°. The diagonals of a square are perpendicular to each other, making them right angles at the center. The sum of the interior angles of a square is calculated by adding another 180° to the total when adding a side (triangle to quadrilateral, quadrilateral to pentagon, etc.).
In a polygon, an interior angle is an angle inside the shape, while an exterior angle is created by extending an edge. In a quadrilateral, the four angles formed at each vertex are called interior angles of a quadrilateral. A square has four equal internal angles, each measuring 90 degrees, so the total of all four angles is 360 degrees.
A regular polygon has all its interior angles equal to each other, such as a square having all its interior angles equal to the right angle or 90 degrees. Every shape has a unique sum of its interior (inside) angles, such as a triangle (3 sides) having 180 degrees, a square (4 sides) having 360 degrees, and a Pentagon (5 sides) having 540 degrees.
To find the measurement of the interior angles in a square, divide the sum of the angles (360°) by the number of sides, resulting in 360° / 4 = 90°. All the interior angles of a square meanure 360°, but each one is 90°. The sum of all interior and exterior angles is both 360° respectively.
📹 How To Calculate The Interior Angles and Exterior Angles of a Regular Polygon
This geometry video tutorial explains how to calculate the interior angles and the exterior angles of a regular polygon. Examples …
📹 how to find the degree of an angle using a speed square
Pivot your square next to your other angle you’re going to read that number right here this is your degrees on your square 60 …
Ok everybody, finish carpenter with decades of experience speaking here. He is right, you set the miter saw at 30, whether for a butt or miter joint. This works on a miter saw and this is good a practical carpentry tip, not a geometry demonstration. The complete angle is 120 (90 + (90-60)). This is because when pivoted that way it is reading down from 90, not up from 0. But the goal was to make the cut, not know the angle.
I feel like most YouTube articles show you but don’t actually teach you anything. Most older men seem like they dont want to share knowledge either maybe because competition or pride i dont know but thank you. That was a nice quick lesson. Not sure what to do in life but building my own tiny house would be nice to know how to do. Easier said than done.
If you cut 30 degrees from 0 on the chop saw, it leaves you with a 60 degree angle on the trim. 30 degrees is the offcut. Do it the other way on the other piece and you will have a 120 degree angle. 30 is the angle of the cut from 90 which is 0 on the saw. Wait, maybe I’ll get my son to explain it to me. He’s a plumber.
If you’re just cutting the end of one board to a certain angle that is called a “single miter.” If you’re cutting 2 boards and joining them together so that they combine to make a certain angle that is called a “double miter.” 2 pieces of quarter round moulding joining at the ends around the corner of a wall would be an example of a double miter. A single piece of vinyl flooring plank that is cut on one end at a certain angle so that it fits correctly with a piece of transition strip that it dead ends into would be an example of a single miter. The formula for single miter goes: 1) determine the angle you need 2) The angle you need in step 1, how many degrees away from 90 is it ? ….. That is what you set your miter saw on to get that angle The formula for double miters is only one extra step. The double miter formula is 1) determine the angle the 2 pieces will be joining together to make 2) divide that angle from the first step by 2 3) how many degrees is the number from step 2 away from 90 degrees? …. that is what you set your miter saw on when you cut both pieces
What always baffles me is why people go to the trouble of recording and posting to YouTube. The title of the article is incorrect, so the information is incorrect. He is explaining it all wrong so he is only confusing the people he is trying to teach. The people that know what he is doing has figured it out… Everyone else is scratching thier head.
It’s wrong. 60 degrees is an acute angle, and this one clearly isn’t acute but obtuse, more than 90, that is. Without knowing much about the speed square, based in what you show, the angle is more like 120 degrees. You add the 30 (remainder from 90) to the first 90, or you subtract the 60 from the 180 (90 + 90). Hope it makes sense.