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math
an equilateral triangle has three equal sides , which equation could be used to find the measure,M,of one angle A.180+3=M  B.3 x 180 C. 1803=180 D. 180 divided by 3=M if you know all the answer GREAT!!!
asked by harlee on February 20, 2017 
Math
Please help quick 1) an iscosceles triangle includes two 72 degree angles. Which equation could be used to find the measure of the third angle? A x + 72 = 180 B x = 180  72 C 72 ÷ x = 180 D 180  2(72) = x Please answer quickly
asked by Kitty on February 5, 2019 
Geometry
Which equation can be used to find the unknow ange measures? The diagram is a triganle. A= x+30, B= 3x, and C = x15 A 5x+15=90 B 5x+45180 C 3x^3+15=180 D 5x+15=180 E 3x+30=180
asked by Haley on July 19, 2011 
Trig
4. Asked to simplify the expression sin(180−è), Rory volunteered the following solution: sin(180−è) = sin 180−sin è, and, because sin 180 is zero, it follows that sin(180−è) is the same as −sin è. Is this answer
asked by sally on April 17, 2010 
Algebra
need help checking Create a 2column proof for the following equation. X + X + 10 + 2(2X + 10) = 180 X + X + 10 + 2(2X + 10) = 180 (Given) 2X + 10 + 2(2X + 10) = 180 (Simplify) 2X + 10 + 4X + 20 = 180 (Expand) 6X + 30 = 180
asked by Anonymous on August 6, 2017 
Trig.
4cosBeta=1+2cosBeta 2cosBeta=1 cosBeta=1/2 60 degrees +/ 180is this right? I know there should be another answer, but I'm not sure if it needs to be 240 +/180 or 120 +/ 180. I don't know how to tell if it's added to 180 or
asked by Tara on January 10, 2010 
Trig (Last URGENT)
sin2x+cosx=0 , [180,180) = 2sinxcosx+cosx=0 = cosx(2sinx+1)=0 cosx=0 x1=cos^1(0) x1=90 x2=36090 x2=270 270 doesn't fit in [180,180) what do I do? Or maybe I did something wrong. sinx=1/2 x1=sin^1(1/2) x1=30 x2=18030 x2=150
asked by Anonymous on February 22, 2012 
geometry
Write a list of steps that are needed to find the measure of angle B. A measures 72 degrees and C measures 113. My answer: A + B + C = 180. 72 + B + (180113) = 180, 72 + B + 67 = 180, B = 180  72  67 = 41 degrees Am I right?
asked by help on March 29, 2019 
physics vectors
Three vectors a, b, and c, each have a magnitude of 42 m and lie in an xy plane. Their directions relative to the positive direction of the x axis are 27 ˚, 194 ˚, and 312 ˚, respectively. B) i need the angle of the vector
asked by kkbrabra on February 6, 2018 
math
Mike is saving money for a new bike that costs $180.00. If m represents the amount of money he has saved so far, which expression represents the amount of money, in dollars, he still needs to save? a. 180 + m b. 180  m c. 180 ' m
asked by john on March 7, 2013 
math angles
find the measure of m
asked by Angelica on January 8, 2007