Q&A for How to Draw a Square

Use the triangle's 90° angle to draw a right angle. Measure from the vertex the same distance along each line you've drawn. Mark that distance on each line. Then draw a right angle vertex at each mark, and extend these new lines until they intersect at the fourth vertex.

Use a compass. Pick a point for the circle's center. draw a straight line in any direction and measure 3.6 cm along the line from the point to another point on the line. That's a radius of the circle. Put the pivot point of the compass on that first point and the pencil lead on the second point 3.6 cm away. Inscribe a circle through that second point.

Draw a line segment 5.5 cm long. Draw a line that bisects the first line perpendicularly. Extend the second line 2.75 cm (half of 5.5 cm) in each direction from the first line. Draw four lines connecting in turn the four ends of the line segments. That's the square.

That's a triangle.

1. Draw a line. Lines are the building block of all shapes. 2. Draw a line parallel to (across from) that first line (the thing you just drew). 3. Connect the ends with two new lines (separate from the lines you just drew) so there is a box-like space (square) left in the middle.

Draw a straight line. At any point on that line construct a 30° angle. (See Construct a 30 Degrees Angle Using Compass and Straightedge . The supplement of that angle is a 150° angle.

If it's a regular octagon, it has eight equally-spaced vertices. Label the vertices A through H in order around the figure. Then draw straight lines connecting A to C, C to E, E to G and G to A. You will have drawn a square inscribed within the octagon.