Answer:
25
Step-by-step explanation:
We can use the Pythagorean theorem to determine the length of the hypotenuse
a^2 + b^2 = c^2
15^2 + 20 ^2 = c^2
225 + 400 = c^2
625 = c^2
Take the square root of each side
sqrt(625) = sqrt(c^2)
25 = c
5.5
1+1+1 3/4+1 3/4= 5.5
5.5*2=11
11/2=5.5
1/2×1/5=1/10
1/5÷2=1/5×1/2=1/10