Essentials of Solid GeometryGinn & Company, 1924 - 238 σελίδες |
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Αποτελέσματα 1 - 5 από τα 31.
Σελίδα 2
... opposite directions so as to be in one straight line . The sum of the angles about a point is two straight angles , or 360 ° . 3. A right angle is half of a straight angle . An acute angle is less than a right angle ; an obtuse angle is ...
... opposite directions so as to be in one straight line . The sum of the angles about a point is two straight angles , or 360 ° . 3. A right angle is half of a straight angle . An acute angle is less than a right angle ; an obtuse angle is ...
Σελίδα 5
... opposite the equal sides are equal . 2. If a triangle has two equal angles , the sides opposite these angles are equal . 3. An equilateral triangle is equiangular . 4. The sum of the three angles of a triangle is a straight angle . 5 ...
... opposite the equal sides are equal . 2. If a triangle has two equal angles , the sides opposite these angles are equal . 3. An equilateral triangle is equiangular . 4. The sum of the three angles of a triangle is a straight angle . 5 ...
Σελίδα 6
... opposite directions from the vertices , the angles are equal . 13. Segments of parallel lines cut off by parallel lines are equal . 14. Two parallel lines are everywhere equally distant from each other . 15. If three or more parallels ...
... opposite directions from the vertices , the angles are equal . 13. Segments of parallel lines cut off by parallel lines are equal . 14. Two parallel lines are everywhere equally distant from each other . 15. If three or more parallels ...
Σελίδα 7
... opposite sides of a parallelogram are equal and the opposite angles are also equal . 4. A diagonal divides a parallelogram into two congru- ent triangles . 5. If the opposite sides of a quadrilateral are equal , the figure is a ...
... opposite sides of a parallelogram are equal and the opposite angles are also equal . 4. A diagonal divides a parallelogram into two congru- ent triangles . 5. If the opposite sides of a quadrilateral are equal , the figure is a ...
Σελίδα 9
... opposite these sides are unequal , and the angle opposite the greater side is the greater . 2. If two angles of a triangle are unequal , the sides opposite these angles are unequal , and the side opposite the greater angle is the ...
... opposite these sides are unequal , and the angle opposite the greater side is the greater . 2. If two angles of a triangle are unequal , the sides opposite these angles are unequal , and the side opposite the greater angle is the ...
Συχνά εμφανιζόμενοι όροι και φράσεις
AABC ABC and A'B'C altitude altitude h angles are equal axis bisects called chord circle circumscribed cone of revolution congruent conic surface Consider Ex Corollary corresponding cube cubic diagonal diameter dihedral angles distance Draw equivalent Exercises face angles Find the area Find the volume formed formula frustum given line given point Hence inches inscribed intersection isosceles lateral area lateral edges lateral faces line segment locus of points lower base measuring number of degrees oblique opposite parallel planes parallelogram perimeter perpendicular plane geometry plane passing pole polyhedral angles Proof Proposition Prove radii rectangular parallelepiped regular polygon regular polyhedrons regular pyramid right angles right circular cylinder Similarly slant height sphere of radius spherical degrees spherical excess spherical polygon spherical triangle straight line tangent tetrahedron Theorem third side total surface triangular prism trihedral upper base vertex vertices zone
Δημοφιλή αποσπάσματα
Σελίδα 7 - The line joining the midpoints of two sides of a triangle is parallel to the third side and equal to one-half of it.
Σελίδα 40 - A line which joins the midpoints of two sides of a triangle is parallel to the third side and equal to half of it.
Σελίδα 176 - 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.
Σελίδα 10 - If two triangles have two sides of the one equal respectively to two sides of the other, but the included angle of the first greater than the included angle of the second, then the third side of the first is greater than the third side of the second. Given A ABC and A'B'C...
Σελίδα 15 - In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of those sides and the projection of the other upon that side.
Σελίδα 77 - The height of a cone is the perpendicular distance from the vertex to the plane of the base.
Σελίδα 3 - If the first of three quantities is greater than the second, and the second is greater than the third, then the first is greater than the third.
Σελίδα 24 - If a straight line is perpendicular to each of two other straight lines at their point of intersection, it is perpendicular to the plane of the two lines.
Σελίδα 16 - If two chords intersect in a circle, the product of the segments of one is equal to the product of the segments of the other.
Σελίδα 15 - The sum of the squares of two sides of a triangle is equal to twice the square of half the third side increased by twice the square of the median upon that side.