I think it is true but I am not 100% sure thought but good luck
S = n(a1 + an)/2
2S = n(a1 + an)
2S = na1 + nan
nan = 2S - na1
an = (2S - n a1)/n
Answer:
C because product means to multiply
To find the area of the triangle you would have to plug in the numbers for this equation: A= Hxb/2
So in your case 14x10/2
140/2= 70 and that would be your answer. Answer:G
Two figures are similar if they have the same shape but not necessarily the same size although they are the same shape they are different sizes