What is the measure of angle 1?

130

Step-by-step explanation:

We know it has a measure of greater than 90 degrees so we can immediately eliminate a and b

We then look at the arrow on the lett and see where it's pointing to.

It's pointing to 50 and 130 but because we know it's an obtuse angle we look at the larger number

So the answer is 130

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry