Math, asked by lakshyamanishsri, 8 months ago




5. In Fig. 8.5, ∆ABC is isosceles with AB = AC. Find the values of x and y.



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Answers

Answered by pubggrandmaster43
15

                                                                                           

  • Answer:
  • x = 105° , and y = 105°

                                                                                       

  • solution

                                                                                       

Triangle ABC is isosceles

⇒ AB=AC

⇒ ∠ABC = ∠ACB

Find ∠ABC :

Since,  ΔABC is isosceles

∠ABC = (180 - 30 ) ÷ 2 = 75º

Find x:

∠ABC and x are on a straight line  

⇒ both angles add up to 180º

x = 180 - ∠ABC

x = 180 - 75 = 105º

Find y:

∠ACB = ∠ABC = 75º

∠ACB and y are on a straight line

⇒ both angles add up to 180º

y = 180 - ∠ACB  

y = 180 - 75 = 105º

                                                                                       

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