Which statement best describes how early African kingdoms fell? O Leaders abandoned their kingdoms in search of gold.
O People brought armies when they traveled to the kingdoms to study,
O Trading with other kingdoms caused the kingdoms to lose money.
The kingdoms were not united, so they became vulnerable to invasion,

Dis the answer you perception is how you see the world 

Ones bigger then than the other

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.