4.Select the icons on the icon palette to display other measurements.

• In the case of the line segment, for example, you can view its length, slope, and equation.

Slope

Equation

5. To close the measurement box, press J twice.

uTo display the area of a rectangular area

You can use the measurement box to display the area of a triangle formed by any three points you select on the display.

Example:

To use the rectangle ABCD to determine the areas of the triangles

 

formed by points A, D, and B, and points A, D, and C

1.Draw the rectangle.

2.Select points A, D, and B.

3.Press J.

This causes the area of the triangle ADB to appear in the measurement box.

4.To make the drawing screen active, press J.

This causes the measurement box to become unhighlighted and the pointer to reappear on the drawing screen.

5.Press o to deselect the current points and then select points A, D, and C.

This causes the area of the triangle ADC to appear in the measurement box. The above procedure shows that the areas of the two triangles are the same.

6.To close the measurement box, press J.

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