Q:

# How do you construct an altitude with a compass?

A:

To construct an altitude with a compass, draw two circles through the specified point, then draw a line through the intersecting arcs. Most often, this is done as a practice in geometry to find the altitude of a triangle.

## Keep Learning

It is a fairly easy process to find the altitude of a compass with a ruler. One simply has to use the ruler to draw a straight line from the specified point on the triangle. Using a compass, however, involves a few more steps.

1. Draw the first circle
2. A triangle has three vertices, usually designated by letters such as A, B and C. If the challenge is to find the altitude of C, use point A as the center point for the compass and the line segment from A to C as the radius to draw the first circle.

3. Draw the second circle
4. Using the example from step one, draw the second circle with point B as the center point. The radius from point B to point C is the radius of the circle.

5. Draw the altitude line
6. The circles will intersect at two points. The first will be at point C on the triangle. The second will be at a point somewhere below the triangle, directly below point C. Use a ruler to draw a line from point C to the intersection below. The measurement of that line from point C to the base of the triangle is the altitude.

Sources:

## Related Questions

• A: Three undefined terms in geometry are point, line and plane. These three terms are explained but not defined as everyone has an intuitive idea of these con... Full Answer >
Filed Under:
• A: The point of tangency is the point at which a line touches an ellipse or circle, assuming that the line only makes contact at one point. The line running t... Full Answer >
Filed Under:
• A: The azimuth angle in astronomy is the arc of the horizon measured clockwise from the south point or north point of the horizon to the point on the horizon ... Full Answer >
Filed Under:
• A: Internally tangent circles occur when two circles on the same plane intersect at exactly one point and one circle lies within the other. Externally tangent... Full Answer >
Filed Under:
PEOPLE SEARCH FOR