Find the third measure of triangle if
First measure=30°
Second Measure = 60°​

2 thoughts on “Find the third measure of triangle if <br />First measure=30°<br />Second Measure = 60°​”

1. Step-by-step explanation:

   sum of a triangle=180°

   a°+b°+c°=180°

   30°+60°+c=180

   =)180-60-30=c

   =)c=90°

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2. Step-by-step explanation:

   Let x = the measure of the second angle

   Let x + 30 = the measure of the first angle

   Let 3(x + x + 30) = the measure of the third angle

   x + x + 30 + 3(2x + 30) = 180

   2x + 30 + 6x + 90 = 180

   8x + 120 = 180

   8x = 60

   x = 7.5°

   x + 30 = 37.5°

   6x + 90 = 135°

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