Homework Help: geometry

Posted by sarah on Thursday, February 5, 2009 at 9:44pm.

Find the longest side of triangle ABC, if measurement A=70, measurement B=2x-10, and measurement C=3x+20.

geometry - Chopsticks, Thursday, February 5, 2009 at 10:04pm
5x-10=80 x=16

B=2(16) - 10 = 22

C= 3(16)+20 = 68

I'm not sure if thats right or not.
geometry - Reiny, Thursday, February 5, 2009 at 10:58pm
I will assume that by "measurement A=70" you are referring to angle A

then 70 + 2x-10 + 3x+20 = 180
5x = 100
x = 20

then angle B = 30 and
angle C = 80

knowing that in any triangle, the largest side is opposite the largest angle, the largest side must be opposite angle C, which would be AB
geometry - DM, Saturday, February 14, 2009 at 10:52am
Find the pattern
Give the formula

0 -- 8
1 -- 11
2 -- 14
3 -- 17
4 --
5 --
50 --
n --

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