Use a different method to find a perimeter of a rectangle. add the lengths of all four sides
3 wigth and 4 length
dont choose 4 x 2 +
3 x 2 = 14

i dont get it. where are the "descriptions"?

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