Cara is sorting buttons by length for a craft project the line plot shows a link of each button if car lands of all the 3/4 inch buttons will be the total length

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

go hook jvc hgv cj xk jvc 6756