celywely
contestada

I'm doing easy math but i don't remember learning this so heres the question.
One angle of a triangle is 20 degrees. The second angle's measurement is four times the third. Whats is the measure of the third angle?

Respuesta :

apologiabiology
total measure is 180

x is 2nd and y is 3rd angle
2nd is 4 times 3rd angle
x=4y

total is 180

20+x+y=180
x=4y
20+4y+y=180
20+5y=180
minus 20 both sides
5y=160
divide by 5
y=32

third angle is 32 degrees

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