Question

What is the value of y?



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y =

Answer 1

Just took the test and got it right :)))

Explanation:

(look at the image down below!!)

Answer 2

`y=40\°`

Explanation:

we know that

An isosceles triangle has two equal sides and two equal angles

The two equal angles are called the base angles and the third angle is called the vertex angle

In this problem the triangle ABC is an isosceles triangle

so

`AB=AC`

`5x=40\°`

`x=8\°`

The sum of the internal angles of a triangle is equal to
`180\°`

so

Find the value of y

`(2y+20)\°+2(40\°)=180\°`

`2y=180\°-20\°-80\°`

`2y=80\°`

`y=40\°`