Answer:
Explanation:
In order to find the measure of our angle, we have to note angle relationships.
All angles in a triangle will add up to 180°
This means all the angles in this triangle will equal 180, or:
We can simplify this equation down to find the value of x.
Combine like terms:
Add 20 to both sides:
Divide both sides by 10:
Now that we know the value of x, we can substitute it into the equation for each angle to find it's value.
m∠H:
m∠I
m∠J
To further prove this is right, we would know that all the angles add up to 180°.
, so we should be right.
Hope this helped!