Answer:
The answer 90 degrees.
Step-by-step explanation:
DE^2 = 1 + 16 = 17.
EF^2 = 16 + 1 = 17.
DF^2 = 9 + 25 = 34.
Since (DE)^2 + (EF)^2 = (DF)^2,
angle E is 90 degrees.
The answer is 80, because that is what you get when you subtract 100 from 180 to get the third angle.
The square root of 16 is expressed as √16 in the radical form and as 161/2 in exponential form. The square root of a number is both negative and positive for the same numerical value i.e., the square root of 16 will be 4
