Y+y+17+111+90=360
2y+128+90=360
2y=360-218
2y=142
y=142/2
y=71
thus, the angles are 71, 90, 111, 88.
11 centimeters is the length of the launch pad
You just need to know that a factor is one of the two numbers you multiply together to get a product. Prime numbers have only two factors: 1 and the number itself.
Product of odd number of negative terms is negative.
Hence, I have given all the 8 possibilities.
Please refer to the table attached.