...Trapezoid, or a Quadrangle, Two of Whose Opposite Sides Are Parallel. — Rule: Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area. To Find the Area of a Regular Polygon. — Rule: Multiply half the perimeter of the figure by the perpendicular...

...Fig. 309, is a rectilineal figure which has two sides only parallel. Its area is obtained thus : — Multiply the sum of the two parallel sides by the...between them, and half the product will be the area. Polygons. — Lastly, the area of any rectilineal polygonal figure, Fig. 310, is obtained by dividing...

...angles and divide the product by 2. Thus, aiX (« + <«) To find the area of a trapezoid (Fig. 18). Rule. Multiply the sum of the two parallel sides by the perpendicular distance between them and divide the product by 2. To compute the area of an irregular polygon. Part 1 To find the area of a...

...area of a trapezoid, which has only two of its sides parallel, is obtained by the rule — Rule 5. — Multiply the sum of the two parallel sides by the...between them, and half the product will be the area. A quadrilateral is a rectilineal figure with four sides. But it is convenient to separate the quadrilaterals...

...trapesoid, or a quadrangle, two of ivhose opposite sides are parallel. Rule — Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area. DC A E, Fig. 8. Ex. i — What is the area of a trapezoid, Fig. 8, whose sides AB and DC are 20.5 and...

...twice the area of the triangle. To find the area of a trapezoid — (19) Multiply the sum of the iivo parallel sides by the perpendicular distance between them, and half the product is the area. FIG. 32. That is, £ (AD + BC) XEB = area. To find the area of any rectilineal figure...