# Drawing Tangent Circles and Lines with Compass and Triangles

## Description

"On base AB, 3 1/2" long construct an equilateral triangle, using the 60-degree triangle. Bisect the angles with the 30-degree angle, extending the bisectors to the opposite sides. With these middle points of the sides as centers and radius equal to 1/2 the side, draw arcs cutting the bisectors. These intersection will be centers for the inscribed circles. With centers on the intersection of these circles and the bisectors, round off the points of the triangle as shown." —French, 1911

## Keywords

circle and line drawing, compass, compasses, drawing circles and lines, Drawing Tangent Circles and Lines with Compass and Triangles, triangle, triangles

## Galleries

## Source:

French, Thomas E *A Manual of Engineering Drawing for Students and Draftsmen* (New York, NY: McGraw-Hill, 1911)