Solving Angle Relationship Problems
Examples of utilizing angle relationships to find unknown angles in diagrams. Learn how to apply properties of vertical angles, supplementary angles, and complementary angles to solve for variable angles efficiently.
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Presentation Transcript
Using Angle Relationships to Solve Problems
Example 1: Find the value of x in the diagram. x 37o These are vertical angles, or opposite angles made by intersecting lines. Relationship: Vertical angles are equal in measure. x = 37o
Example 2: Find the value of x in the diagram. 120o 2x Relationship: Vertical angles are equal in measure. 2x = 120o 2 2 Solve equation for x. x = 60o
Example 3: Find the value of x in the diagram. Relationship: Vertical angles are equal in measure. 3x - 10 50o 3x 10 = 50o Solve equation for x. + 10 +10 3x = 60 3 3 x = 20o
Example 4: Find the value of x in the diagram. x 53o These are supplementary angles. Relationship: Supplementary angles add to 180o. x + 53o = 180o - 53 - 53 Solve equation for x. x = 127o
Example 5: Find the value of x in the diagram. 80o 10x Relationship: Supplementary angles add to 180o. 10x + 80o = 180o - 80 - 80 Solve equation for x. 10x = 100o 10 10 x = 10o
Example 6: Find the value of x in the diagram. x x + 48 Relationship: Supplementary angles add to 180o. x + x + 48o = 180o Solve equation for x. 2x + 48o = 180o - 48 - 48 2x = 132o 2 2 x = 66o
Example 7: Find the value of x in the diagram. x 15o These are complementary angles. Relationship: Complementary angles add to 90o. x + 15o = 90o - 15 - 15 Solve equation for x. x = 75o
Example 8: Find the value of x in the diagram. 63o 3x Relationship: Complementary angles add to 90o. 3x + 63o = 90o - 63 - 63 3x = 27 3 3 Solve equation for x. x = 9o
Example 9: Find the value of x in the diagram. x + 16o Relationship: Complementary angles add to 90o. x x + x + 16o = 90o 2x + 16o = 90o Solve equation for x. - 16 - 16 2x = 74 2 2 x = 37o