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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 :

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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