A triangle, quadrilateral, pentagon, hexagon,heptagon, and octagon are shown in figure 1-4.A trapezoid, trapezium, rhombus, and rhomboidare shown in figure 1-5.DETERMINING AREASThe area of any surface is the number of unitsof area measure the surface contains. A unit ofarea measure is a square unit. The main thing toremember when computing for areas is that thedimensions used must be of the same unit ofmeasure—if in inches, all units must be in inchesand if in feet, all must be in feet.Figure 1-4.-Geometric figures of a triangle, quadrilateral,pentagon, hexagon, heptagon, and octagon.Figure 1-5.-Geometric figures of a trapezoid, trapezium,rhombus, and rhomboid.1-9
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