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24-01-2020
Mathematics

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MARKING BRAINLIST | What is the value of y?

MARKING BRAINLIST What is the value of y class=

Respuesta :

24-01-2020

Answer: y = 5

Step-by-step explanation:

This triangle is isosceles.

So, ∠ABC = ∠ACB = 75°

Now,

sum of interior angles of a triangle = 180°

∠ABC + ∠ACB + ∠BAC = 180°

75° + 75° + (4y + 10)° = 180°

160° + 4y° = 180°

4y° = 20°

y = 5

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