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Chapter 4
Chapter 4

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Geometry Lesson 4-4 Using Congruent Triangles CPCTC.notebook

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... triangle are equal, respectively, to two sides and the included angle of a second triangle, then the triangles are congruent. (SAA) – two angles determine third angle. Angle-Side-Angle (ASA) If two angles and the included side of one triangle are equal, respectively, to two angles and the included s ...
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... The supplement of an angle measures 75°. What is the measure of the angle? The complement of an angle measures 65°. What is the measure of the angle? What is the approximate distance between opposite corners of a 5 by 8 inch photograph? Yes or No Can the following be the lengths of the sides of a tr ...
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History of trigonometry

Early study of triangles can be traced to the 2nd millennium BC, in Egyptian mathematics (Rhind Mathematical Papyrus) and Babylonian mathematics.Systematic study of trigonometric functions began in Hellenistic mathematics, reaching India as part of Hellenistic astronomy. In Indian astronomy, the study of trigonometric functions flowered in the Gupta period, especially due to Aryabhata (6th century CE). During the Middle Ages, the study of trigonometry continued in Islamic mathematics, hence it was adopted as a separate subject in the Latin West beginning in the Renaissance with Regiomontanus.The development of modern trigonometry shifted during the western Age of Enlightenment, beginning with 17th-century mathematics (Isaac Newton and James Stirling) and reaching its modern form with Leonhard Euler (1748).
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