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Pearson Geometry Common Core, 2011

PG

Pearson Geometry Common Core, 2011 View details

7. Midpoint and Distance in the Coordinate Plane

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Exercise 67 Page 56

The symbol ∠ refers to an angle.

∠ PQR
∠ RQP

Practice makes perfect

Whenever we use the symbol ∠, we know that it is referring to an angle. One way to name an angle is to use the letter or number that corresponds to the vertex of the angle. In this case, it is Q.

∠ Q However, in the exercise we have multiple angles with the same vertex, so we have to use different notation. To avoid confusion, we can place the letter name of the vertex between the name of points that lie on the rays creating the angle. We can do this in two ways by interchanging the names of the points. Here, we have P and R. ∠ PQR or ∠ RQP In this way there is no ambiguity in our notation and we have two other ways of naming angle ∠ 1.

Subchapter links

Lesson Check p.53

Practice and Problem-Solving Exercises p.54-56

Standardized Test Prep p.56

Mixed Review p.56