*We look at these, and then review some useful, well-established problem-solving frameworks.*

*We look at these, and then review some useful, well-established problem-solving frameworks.*

Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure.

Geometry and Measurement Word Problems In Topic C, students use concrete examples to discover the additive nature of angle measurement.

Much of that confidence comes from having a good process to use when approaching a problem.

With one, you can solve problems quickly and effectively.

So it follows that when you're taking this more formal approach, your problem is likely to be complex and difficult to understand, because there's a web of interrelated issues.

The good news is that there are numerous tools you can use to make sense of this tangled mess!For example, if performance in your department is substandard, you might think the problem is with the individuals submitting work.However, if you look a bit deeper, the real issue might be a lack of training, or an unreasonable workload.If you commit yourself too early, you can end up with a problem statement that's really a solution instead.For example, consider this problem statement: "We have to find a way of disciplining of people who do substandard work." This doesn't allow you the opportunity of discovering the real reasons for under-performance.Without one, your solutions may be ineffective, or you'll get stuck and do nothing, with sometimes painful consequences.There are four basic steps in solving a problem: Steps 2 to 4 of this process are covered in depth in other areas of Mind Tools.As they work with pattern blocks in Lesson 9, students see that the measures of all of the angles at a point, with no overlaps or gaps, add up to 360°, and they use this fact to find the measure of the pattern blocks’ angles.In Lesson 10, students use what they know about the additive nature of angle measure to reason about the relationships between pairs of adjacent angles.Additionally, through their work with angles on a line, students go on to discover that vertical angles have the same measure. Problem Solving with the Addition of Angle Measures 10/24/14 This work is licensed under a Creative Commons Attribution-Non Commercial-Share Alike 3.0 Unported. (Lesson 9) Objective 2: Use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure. In both Lessons 10 and 11, students write addition and subtraction equations to solve unknown angle problems. (Lessons 10–11) Topic C: Date: © 2014 Common Core, Inc. Problem Solving with the Addition of Angle Measures 10/24/14 This work is licensed under a Creative Commons Attribution-Non Commercial-Share Alike 3.0 Unported.

## Comments Problem Solving Addition

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