Plane GeometryMacmillan, 1901 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 38.
Σελίδα 4
... . Two lines are perpendicular to each other if they meet at right angles , as DN and EF ( Fig . 11 ) . The point O is called the foot of the perpendicular DO . A B FIG . 13 . -- 36. Oblique angles are acute , obtuse , or reflex 4 GEOMETRY.
... . Two lines are perpendicular to each other if they meet at right angles , as DN and EF ( Fig . 11 ) . The point O is called the foot of the perpendicular DO . A B FIG . 13 . -- 36. Oblique angles are acute , obtuse , or reflex 4 GEOMETRY.
Σελίδα 6
... meet in a point . Which angle is the sum of AOB and BOC ? the sum of BOC and COD ? the difference between BOD and COD ? 15. In the same diagram , if AOB = 60 ° , BOC = 30 ° , and COD = 90 ° , find AOC , BOD , and AOD . 16. If the four ...
... meet in a point . Which angle is the sum of AOB and BOC ? the sum of BOC and COD ? the difference between BOD and COD ? 15. In the same diagram , if AOB = 60 ° , BOC = 30 ° , and COD = 90 ° , find AOC , BOD , and AOD . 16. If the four ...
Σελίδα 7
... meet in a point , O , forming six angles , 1 , 2 , 3 , 4 , 5 , and 6. Find angle 3 , if angle 1 = 80 ° and angle 5 = 60 ° . GENERAL TERMS 42. A theorem is a geometrical truth requiring demonstration . 43. An axiom is a geometrical truth ...
... meet in a point , O , forming six angles , 1 , 2 , 3 , 4 , 5 , and 6. Find angle 3 , if angle 1 = 80 ° and angle 5 = 60 ° . GENERAL TERMS 42. A theorem is a geometrical truth requiring demonstration . 43. An axiom is a geometrical truth ...
Σελίδα 10
... meet in a point , O , prove LAOE - LFOD = LAOC . Ex . 29. In the same diagram , prove : LAOE + LEOD – LAOD = 2 LAOC . Ex . 30. In the same diagram , prove : LAOC + LEOB + 2DOF = 2 rt . . Ex . 31. In the same diagram , prove : LAOE +2 ...
... meet in a point , O , prove LAOE - LFOD = LAOC . Ex . 29. In the same diagram , prove : LAOE + LEOD – LAOD = 2 LAOC . Ex . 30. In the same diagram , prove : LAOC + LEOB + 2DOF = 2 rt . . Ex . 31. In the same diagram , prove : LAOE +2 ...
Σελίδα 13
... meet the sides of the angle , two equal triangles are formed . Ex . 33. If through the midpoint of a straight line any line be drawn to meet the perpendiculars erected at the ends of the given line , two equal triangles are formed . Ex ...
... meet the sides of the angle , two equal triangles are formed . Ex . 33. If through the midpoint of a straight line any line be drawn to meet the perpendiculars erected at the ends of the given line , two equal triangles are formed . Ex ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
AABC ABCD adjacent angles algebraic altitude angle equal angle formed angles are equal apothem base angle bisect bisector central angle circumference construct a triangle decagon diagonals diagram for Prop diameter draw drawn equiangular equiangular polygon equilateral triangle equivalent exterior angle find a point Find the area given circle given line given point given triangle HINT homologous sides hypotenuse inscribed isosceles triangle joining the midpoints line joining mean proportional measured by arc median opposite sides parallel lines parallelogram perimeter perpendicular perpendicular-bisector point equidistant produced proof is left PROPOSITION prove Proof proving the equality quadrilateral radii rectangle regular hexagon regular polygon rhombus right angle right triangle SCHOLIUM School secant segments side equal similar polygons similar triangles straight angle straight line tangent THEOREM third side transversal trapezoid triangle ABC triangle are equal vertex vertical angle
Δημοφιλή αποσπάσματα
Σελίδα 148 - If two chords intersect within a circle, the product of the segments of one is equal to the product of the segments of the other.
Σελίδα 180 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. B' ADC A' D' C' Hyp. In triangles ABC and A'B'C', ZA = ZA'.
Σελίδα 45 - If two triangles have two sides of one equal respectively to two sides of the other, but the included angle of the first triangle greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
Σελίδα 31 - The median to the base of an isosceles triangle is perpendicular to the base.
Σελίδα 209 - The area of a regular polygon is equal to onehalf the product of its apothem and perimeter.
Σελίδα 130 - If a line divides two sides of a triangle proportionally, it is parallel to the third side.
Σελίδα 71 - The midpoints of two opposite sides of a quadrilateral and the midpoints of the diagonals determine the vertices of a parallelogram. * Ex.
Σελίδα 26 - If one angle of a triangle is equal to the sum of the other two, the triangle can be divided into two isosceles triangles.
Σελίδα 190 - The areas of two similar triangles are to each other as the squares of any two homologous sides.
Σελίδα 56 - A line which joins the midpoints of two sides of a triangle is parallel to the third side and equal to half of it.