panggalila
panggalila panggalila
  • 30-06-2014
  • Mathematics
contestada

Find the perimeter of an isosceles triangle
whose base is  40  cm and whose base angle is  70".






Respuesta :

Аноним Аноним
  • 30-06-2014
[tex]cos70^o=\frac{20}{x}\\\\cos70^o\approx0.342\\\\\frac{20}{x}=0.342\\\\0.342x=20\ \ \ \ /:0.342\\\\x\approx58.5\ (cm)\\\\Perimeter:40cm+2\cdot58.5cm=157cm[/tex]
Ver imagen Аноним
Answer Link
kate200468
kate200468 kate200468
  • 04-07-2014
[tex]cos70^0= \frac{20}{x}\\\\x= \frac{20}{cos70^0} \\\\the\ perimeter\ is:\\\\ P=2x+40=\frac{40}{cos70^0}+40 \ \ \ and\ \ \ cos70^0\approx0.3420\\\\P\approx\frac{40}{0.342}+40\approx156.96\ [cm][/tex]
Answer Link

Otras preguntas

how long does it take to receive ahead mental health diagnosis
Sourcing) When was this speech delivered? What is the purpose of this speech?
Which statement describes the solar feature labeled B?
What is the slope of the graph of this function in decimal form? (6,1) (-6,-5)
I need help with this question and a step by step explanation for future references, Thanks!
In which state would you find the geographical center of north america? north dakota.
What are amino acids used for? ASAP
Calculate the pOH for a solution with a hydroxide ion, (OH-) of concentration of 6.49 X 10-11 M. Calculate the pH. Note: the answers should have three significa
narrative piece of art?
Which of the following particles is similar to a He nucleus? alpha beta gamma neutrino