Which shows 628.307 in word form?

six hundred and twenty eight point three hundred and seven

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

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.