Finding angles with algebraic expressions

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Presentation transcript:

Finding angles with algebraic expressions

You need to take the concepts that we have learned to find the value of x 5x + 40 x + 20

What do we know about these angles 5x + 40 x + 20

What do we know about these angles They add up to 180 5x + 40 x + 20

Set the two equations so they add up to 180 5x + 40 + x + 20 = 180 Now solve for x 6x + 60 = 180 6x = 120 X = 20 5x + 40 x + 20

What do you know about these angles 5x + 10 2x + 70

What do you know about these angles They are equal to each other 5x + 10 2x + 70

Set the equations equal to each other and solve for x 5x + 10 = 2x + 70 -2x 3x + 10 = 70 - 10 3x = 60 X = 20 5x + 10 2x + 70

Find x 2x + 60 7x+ 30

Find x 10x + 10 3x + 59