Practical arithmetic : by induction and analysis . se. The perpendicular hightis the shortest distance from the base to the op-posite angle. Thus, A B C is a triangle ; A Cis the base, and B D the perpendicular hight. 10. A Quad-ri-lat-er-al is bounded by 4 straight lines. 11. A Polygon is bounded by more than 4 straight lines, 12. A Par-al-lel^-o-gram is a quadrilateralwhose opposite sides are parallel. Thus, M N O P is a parallelogram. 13. A Rect^-an-gle is a quadrilateral whoseopposite sides are parallel; its angles rightangles. Thus, 11E C T is a rectangle. 14. A Square is a quadrilateral
Practical arithmetic : by induction and analysis . se. The perpendicular hightis the shortest distance from the base to the op-posite angle. Thus, A B C is a triangle ; A Cis the base, and B D the perpendicular hight. 10. A Quad-ri-lat-er-al is bounded by 4 straight lines. 11. A Polygon is bounded by more than 4 straight lines, 12. A Par-al-lel^-o-gram is a quadrilateralwhose opposite sides are parallel. Thus, M N O P is a parallelogram. 13. A Rect^-an-gle is a quadrilateral whoseopposite sides are parallel; its angles rightangles. Thus, 11E C T is a rectangle. 14. A Square is a quadrilateral whose sidesare equal to each other; its angles right , S Q U A is a square. 15. A Rhom^-bus is a quadrilateral whose sides are equal toeach other; its angles, not right angles. See Fig. Def. 12. 16. A Trap^-e-zoid is a quadrilateral havingonly two sides parallel. Thus, Z OI D is atrapezoid; the sides Z D and 01 being parallel. 17. A Tra-pe^-zium is a quadrilateral havingno two sides parallel tn each other. Thus, T R A P is a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectarithmetic, bookyear1
