Question

The exterior angles of a triangle are 3yº, 4y
and 5y
(i) Find the value of y.
(ii) Find the smallest interior angle of the triangle.​

Answer 1

Answer:

y = 30

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

Step-by-step explanation:

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