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Find one area of each triangle. Round intermediate values of the nearest tenth. Ust the rounded values to calcuate the next value. Round your final answer to the nearest tenth. Please help and show work! Drawing Below >!
 one year ago
 one year ago
Find one area of each triangle. Round intermediate values of the nearest tenth. Ust the rounded values to calcuate the next value. Round your final answer to the nearest tenth. Please help and show work! Drawing Below >!
 one year ago
 one year ago

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28TylerrBest ResponseYou've already chosen the best response.0
dw:1337035285613:dw
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
So, what is the formula for area of a triangle?
 one year ago

28TylerrBest ResponseYou've already chosen the best response.0
a2 +b2= c2 and a= 1/2 bh.
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
ok, so we have the height. We want to find the base length to plug into the area formula Of course, you went a step ahead and gave the next formula as well. We would have to use Pythagorean Theorem to determine the length of the base. a^2 + b^2 = c^2
 one year ago

28TylerrBest ResponseYou've already chosen the best response.0
So would it be a2 +8^2 =7^2
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
In a^2 + b^2 = c^2, the a^2 and b^2 represent the squared lengths of the legs of the triangle. The c^2 represents the hypotenuse length squared. dw:1337037273817:dw
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
So you'd have 7^2 + b^2 = 8^2. We'd solve for b there.
 one year ago

28TylerrBest ResponseYou've already chosen the best response.0
Ok so it would be 7^2 + b^2 = 8^2?
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
Once we find b there, we round it to the nearest tenth and then apply it in the area formula with the height 7 and that as the base.
 one year ago

28TylerrBest ResponseYou've already chosen the best response.0
So what would the total answer be for the a2 + b2 = c2?
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
7^2 + b^2 = 8^2 49 + b^2 = 64 b^2 = 15 b = sqrt{15} then you can evaluate this in calculator to round it to nearest tenth
 one year ago

28TylerrBest ResponseYou've already chosen the best response.0
I typed it in and squared rooted it and I still got 15
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
Hm maybe it was typed in wrong. I get sqrt(15) ~ 3.87298
 one year ago

28TylerrBest ResponseYou've already chosen the best response.0
So would the round to 4?
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
we round it to nearest tenth, so we look at the 3.87 and determine whether to keep 3.8 or go to 3.9
 one year ago

28TylerrBest ResponseYou've already chosen the best response.0
We would keep it at 3.9?
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
Yes, we use 3.9. So, just plug it into area formula \(A = \frac{1}{2} b h \) with b = 3.9 and h = 7 and solve for A. It looks like you have to round the value of A to nearest tenth also.
 one year ago

AccessDeniedBest ResponseYou've already chosen the best response.0
So, what I get is A = 1/2 (3.9) (7) = 13.65 = 13.7 rounded up to nearest tenth.
 one year ago
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