Question

Can someone check these answers for me please?:)
1. The two shorter sides of an obtuse triangle are 20 and 30. What is the least whole number length for the third side?
(a.) 35
b. 45
c. 37
d. 47

2. The longer leg of a 30-60-90 triangle is 6. What is the length of the hypotenuse?
a. 2√3
b. 3√2
c. 4√3
(d.) 12

3. The hypotenuse of a 30-60-90 triangle is 30. What is the length of one of its legs?
a. 3√10
b. 10√3
c. 15√2
(d.) 15

Thanks! x