Can you please tell me what subtotal is?

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy