Geometry Vocabulary
... A PLANE (no, not the one that flies!) is a flat surface that goes on forever in all directions. Imagine sitting on a row boat in the middle of the ocean. No matter which way you look…all you see is water…forever. ...
... A PLANE (no, not the one that flies!) is a flat surface that goes on forever in all directions. Imagine sitting on a row boat in the middle of the ocean. No matter which way you look…all you see is water…forever. ...
converse of isosceles triangle theorem
... Proof. First, assume 1 and 2 are true. Since AD is a median, BD ∼ = CD. Since AD is an altitude, AD and BC are perpendicular. Thus, ∠ADB and ∠ADC are right angles and therefore congruent. Since we have ∗ hConverseOfIsoscelesTriangleTheoremi created: h2013-03-21i by: hWkbj79i version: h39526i Privacy ...
... Proof. First, assume 1 and 2 are true. Since AD is a median, BD ∼ = CD. Since AD is an altitude, AD and BC are perpendicular. Thus, ∠ADB and ∠ADC are right angles and therefore congruent. Since we have ∗ hConverseOfIsoscelesTriangleTheoremi created: h2013-03-21i by: hWkbj79i version: h39526i Privacy ...
Numerical value: The absolute value of a number, geometrically, is
... square of side 1 has area 1 or unit area; the area of any planar region can be thought of as the number of such unit squares it contains. ...
... square of side 1 has area 1 or unit area; the area of any planar region can be thought of as the number of such unit squares it contains. ...
Name ____________________ Period _______________ Geometry Date __________________
... Find: Sum of interior angles given # of sides ( and visa versa) # of sides given each exterior angle What is the sum of exterior angles What is meant by regular polygon In a polygon # of sides = # of angles. Relationship between interior and exterior angles = linear pair, supplementary 2. Quadrilate ...
... Find: Sum of interior angles given # of sides ( and visa versa) # of sides given each exterior angle What is the sum of exterior angles What is meant by regular polygon In a polygon # of sides = # of angles. Relationship between interior and exterior angles = linear pair, supplementary 2. Quadrilate ...
History of geometry
Geometry (from the Ancient Greek: γεωμετρία; geo- ""earth"", -metron ""measurement"") arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre-modern mathematics, the other being the study of numbers (arithmetic).Classic geometry was focused in compass and straightedge constructions. Geometry was revolutionized by Euclid, who introduced mathematical rigor and the axiomatic method still in use today. His book, The Elements is widely considered the most influential textbook of all time, and was known to all educated people in the West until the middle of the 20th century.In modern times, geometric concepts have been generalized to a high level of abstraction and complexity, and have been subjected to the methods of calculus and abstract algebra, so that many modern branches of the field are barely recognizable as the descendants of early geometry. (See Areas of mathematics and Algebraic geometry.)