Answer:
21
Step-dream ):)
(1) equilateral
(2)isosceles
(3)scalene
(4)right
(5)acute
(6)obtuse
9514 1404 393
B. 91
Step-by-step explanation:
14C12 = 14!/(12!(14-12)!) = 14·13/(2·1) = 7·13 = 91