Sas triangles - PowerPoint PPT Presentation

Drawing Triangles

Drawing Triangles. Using a Protractor. SAS triangles. ASA triangles. www.mathsrevision.com. SSS triangles. 80 o. Q3. Calculate the missing angles. (SAS) Starter Questions. Q1. Convert the percentages to fractions. (a) 30%. (b) 60%. Q2. Write down all the factors of 16.

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Section 11.2 Law of Cosines

Section 11.2 Law of Cosines. Law of Sines. Can you use the Law of Sines ?. C. a. 6. No. 70 . B. 8. Law of Sines. Can you use the Law of Sines ?. C. 7. 6. No. A. B. 8. Law of Cosines. The Law of Cosines can be used when SAS or SSS information is given about the triangle.

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6.2 Law of Cosines

6.2 Law of Cosines. x 2 = y 2 + z 2 –2yzcosX. Use law of cosines for SSS or SAS triangles . Ex. 1 Find the three angles of a triangle whose sides have lengths a = 8 ft., b = 19 ft., and c = 14 ft. B. c = 14. a = 8. C. A. b = 19. Heron’s Area Formula.

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