Grade 7 | Unit 7 | Lesson 9: Drawing Triangles (Part 1) | Practice Problems

Use a protractor to try to draw each triangle. Which of these three triangles is impossible to draw?

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One of the particles in atoms is called an electron. It has a charge of -1. Another particle in atoms is a proton. It has charge of +1. The overall charge of an atom is the sum of the charges of the electrons and the protons. Here is a list of common elements. Find the overall charge for the rest of the atoms on the list.

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A factory produces 3 bottles of sparkling water for every 7 bottles of plain water. If those are the only two products they produce, what percentage of their production is sparkling water? What percentage is plain?

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