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4 years ago

Can someone please help me? What is the value of y? and how do you solve this. Thanks :)

Mathematics

2 answers:

Lady_Fox [76]4 years ago

4 0

You solve it by adding up all 3 angles, and then writing

(the sum) = 180 degrees.

This equation is true in EVERY triangle.

Write it, and then solve it to find y .

CaHeK987 [17]4 years ago

4 0

The sum of the triangle is 180
180 = 40 + (y+30) + y
-40 -40
140 = (y+30) + y
140 = 2y + 30
-30 -30
110 = 2y
/2 /2
55 = y (40+55+85=180)

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