kmariee24
kmariee24 kmariee24
  • 02-04-2021
  • Mathematics
contestada

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=

Respuesta :

lesandisusanya
lesandisusanya lesandisusanya
  • 03-04-2021

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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