Skip to main content

Construct First Diameter-Chord

0:00
1:26
61.2K views

At 0:00 in

Finding the center of a circle #diy #reels #homeowners #tools #math

What happens here

Begin with a circle drawn on your work surface. Take a carpenter's square (also known as a framing square) and place its 90-degree corner, often referred to as the 'heel', precisely on any single point along the circumference of the circle. Using a marker, draw a straight line along one arm of the square (the 'body') from the heel until it intersects the circle's circumference at a second point. Repeat this for the other arm of the square (the 'tongue'), drawing a second line from the same heel point to intersect the circle's circumference at a third point. Once both lines are drawn, use the carpenter's square as a straight edge or a dedicated ruler to connect the two new points on the circumference (where the arms intersected the circle) with a straight line. This connecting line is a chord that passes through the center, effectively defining a diameter of the circle.

Goal: Create the first diameter-defining chord of the circle

Tools and materials

  • Carpenter's Square — Measuring a 90-degree angle and acting as a straight edge to draw lines
  • Marker — Drawing lines on the surface
  • Surface with Circle — The surface on which the circle is drawn for the project

What they say

Hide

What up? Let's find the center of this circle. Take your carpenter square, framing square, whatever you want to call it. Put your heel on the edge. I don't care where you put your heel, just put it on the edge of the circle, right? Trace a line on the outside of your body. The outside of your tongue, okay? Now, go ahead and connect these two lines together here. Like so.

Auto-generated from the video audio.