vontae73
vontae73
09-12-2020
Mathematics
contestada
what is the measure of angle A in the triangle
Respuesta :
mihailovicneda1
mihailovicneda1
09-12-2020
2x+4+3x-13+180-116=180
5x+4-129=0
5x=125
x=25
A=3x-13=75-13=62
Answer Link
cadenceb12
cadenceb12
09-12-2020
Okay so we know a straight line is equal to 180 degrees, so first thing to do is subtract 180 by 116 to get angle C
C = 64
then we know all the angles in a triangle add up to 180 also
so we can do 64 + (2x + 4) + (3x - 13) = 180
combine like terms:
55 + 5x = 180
solve: x = 25
plug this back into the equation for angle A:
2(25) + 4
A = 54
Answer Link
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