Question

In a triangle, the ratio between the first and second angle is 1 : 2 and the third angle is 72. Find the first and second angle of the triangle. ​

Answer 1

Answer:-

78

Step-by-step explanation:-

Right Angle Triangle

Default is 90

Let's consider ? = x

1 + 2 + 3 = Right Angle Triangle ( 180 )

x + 90 + 72 = 180

x + 162 = 180

x = 180 - 162

x = 78

Recheck

78 + 90 + 72

= 162 + 78

= 240

240/3 = 180

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