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

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