Question

The exterior angles of a triangle are 3y,4y and 5y, find the value of y and find the smallest interior angle of the triangle

Answer 1

Answer:

3y+4y+5y=180

12y=180

y=60

Answer 2

Answer:

y = 30

Step-by-step explanation:

The sum of the internal angles of a triangle is 180 degrees.

Internal angles are 180 - 3y

180 - 4y

180 - 5y

180 - 3y + 180 - 4y + 180 - 5y = 180

-3y - 4y - 5y = 180 - 180 - 180 - 180

-12y = -360

12y = 360

y = 30