Pythagorean formula
The legs of a right triangle are 4 and 7. What is the length of the hypotenuse?
sqrt(65)
What is the distance between (0,0) and (3,4)?
5
What is 12C1?
12
The legs of a right triangle are 8 and 9. What is the length of the hypotenuse?
sqrt(145)
What is the distance between (1,2) and (6,7)?
sqrt(50) or 5sqrt(2)
What is 14C2?
91
A right triangle has a hypotenuse of 17 and a leg of 15. What is the other leg?
8
What is the distance between (-2, 14) and (7, 8)?
sqrt(117) or 3sqrt(13)
What is 8C5?
56
A right triangle has a hypotenuse of 25 and a leg of 24. What is the other leg?
7
What is the distance between (-3, 4) and (-8, -2)?
sqrt(61)
What is 10C6?
210
A right triangle has a leg of 9 and the hypotenuse is 1 longer than the other leg. What is the length of the other leg?
40
What is the distance between (0, 0, 0) and (1, 2, 3)?
sqrt(14)
What is nC2?
n(n-1)/2