Khan/khan-exercises — Issue #5606: Angle bisector theorem - Wrong answer when rounding up
Author: KhanBugz
Created: 2011-11-04 22:07:07+00:00
State: open
Labels: chrome, xp

Reporter: samuel.e.pearl@gmail.com

I multiplied 3.8 x 5.1 = 19.38
then was to divide by 7.6 to get the length for angle BD. The calculator answer was 2.55 one is required to "round to 1 decimal place" because the other number is a 5 I rounded up to 2.6 but got marked as wrong. Upon clicking on hints it was revealed that the answer was supposed to be 2.5. What is the error here? The question has the Angle Bisector Theorem. Side for angle AC is 7.6, Angle CD is 5.1 Angle AD is where the adjacent triangle unites. AB is 3.8. It asks to find angle BD. So I find it by multiplying 3.8 x 5.1 then dividing by 7.6 answer 2.55 round up correct ? to 2.6

[angle_bisector_theorem.html?seed=65&problem=BD](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/angle_bisector_theorem.html?seed=65&problem=BD&debug)

["2.6","2.5"]

Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2

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