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Write and solve an equation to determine the measures of the angles in each
triangle.
9, 10, and 11

Write And Solve An Equation To Determine The Measures Of The Angles In Each Triangle 9 10 And 11 class=

Sagot :

lesandisusanya

Answer:

9. x = 45°

10. x = 55°

11. x = 9°

Step-by-step explanation:

[tex]9. \: x + x + 2x = 180 \\ 4x = 180 \\ x = \frac{180}{4} \\ x = 45[/tex]

[tex]10. \: x + (x - 2) + 72 = 180 \\ x + x - 2 + 72 = 180 \\ 2x + 70 = 180 \\ 2x = 180 - 70 \\ 2x = 110 \\ x = \frac{110}{2} \\ x = 55 \\ [/tex]

[tex]11. \: 4x + 3x + 13x = 180 \\ 20x = 180 \\ x = \frac{180}{20} \\ x = 9 \\ [/tex]

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