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How Do You Find Angle Measures for Adjacent Angles?

In the diagram at right, angle GEM measures 172.5°. Find the measure of angle GET

Summary

  1. An angle is formed when 2 rays are connected by a common endpoint.
  2. x is the variable we need to find to find the measure of GET
  3. Angles are adjacent when they have a common side and a common vertex.
  4. Plug 33.1 in for x to find the measure of GET

Notes

    1. An angle is formed when 2 rays are connected by a common endpoint.
    1. An angle is formed when 2 rays are connected by a common endpoint.
    2. x is the variable we need to find to find the measure of GET
    1. We need to set up an equation that contains x so that we can solve for x
    1. Angles are adjacent when they have a common side and a common vertex.
    2. Since both GET and TEM have x and we know the measure of GEM, we can set up an equation to solve for x
    1. Like terms have the same variables raised to the same power, such as 7x+2x or 18x3+5x3.
    2. Here, 3x and 2x are like terms, so we can combine them to get 5x
    1. Plug 33.1 in for x to find the measure of GET
    2. First multiply 3•33.1 to get 99.3
    3. Then add 99.3+7 to get 106.3°, which is the measure of angle GET