I only could find part of the triangle sorry, but u1 is 2 radical 2
Answer:
78.54
Step-by-step explanation:
first you have to divided 31.4 by 3.14 to get your diameter so you can get your radius. 31.4 divided by 3.14 equals 10 and 10 divided by 2 equals 5 which is you radius. The formula for area for a circle is πr². 5 squared is 25 and 3.14 times 25 equals 78 .54 which is your answer.
The answer to the square root of 40 is 6.33
1: right triangle, 2: right triangle, 3: not a right triangle, 4:not a right triangle.
Note --> As you're writing 'zeroes' , I assume there is a typing mistake and you've given a Quadratic equation in the question

Hence , the roots are 1/2 and -6
The graph attached confirms the same ,
Hope it helps you :)