Question

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

Answer 1

Step-by-step explanation:

sum of a triangle=180°

a°+b°+c°=180°

30°+60°+c=180

=)180-60-30=c

=)c=90°

Answer 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°