Answer:
the first choice is correct bc the second one one of the triangles has a right angle the third choice has acute and obtuse angles while the last one, onl one or two of tem have equal sides, not all of them
Step-by-step explanation:
3.04166666667
I have no idea sorry
10
-3 X 5= -15
-15+25= 10
500
3 x 10^8 /6 x 10^5 = 500
