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9.2 sum and difference identities; Here we have three triangles, δ aec, δ bcf and δ bdc. Chapter 9 test review name_____ 4. Ae = 6 cm and ec = 7. Give an approximation to 3 decimal places. You have to solve the word problems using the mind rather than the. The tips below will allow you to fill in chapter 9 test form 2a answer key geometry quickly and easily:. Ad we do the work for you. Web geometry chapter 9 test answer key. Simplify answers that are radicals. Triangle bcd which is similar to ace.