The exterior angle of a triangle is 115° one of the interior opposite angle is 55°. The other interior angle is ?

60°

Step-by-step explanation:

The exterior angle of a triangle is 115° one of the interior opposite angle is 55°. The other interior angle is ?

An exterior angle = The sum of two interior angles

Let the other interior angle = x

Hence:

115° = 55° + x

x = 115° - 55°

x = 60°

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

i dont have an answer

step-by-step explanation: