Answer:
D
Step-by-step explanation:
you use the Pythagorean theorem
It states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.
so mathematically
a2+b2=c2
a and b being the short sides and C being the Hypotenuse
so in our case
a= 10 cm
b= ?
c= 18
a2+b2=c2
(10cm)2+(b)2=(18cm)2
100cm2+b2=324cm2
b2=324cm2-100cm2
b2=224cm2
*putting both sides under a square root*
b=4sqrt14cm
