How do I find the measurement of an angle of a triangle if I know what the other two angles are. For example, I know the first is 90 degress, the second angle is 30 degress, but I need to know what the third angle is.
The angles of a triangle add up to 180 degrees
As for your earlier question about the corner cabinet, I need a picture to understand.
Height from the floor to the counter is 30 or is it the altitude of the triangle the counter shape is? Hypotenuse of what triangle? perimeter around the counter or the cabinet face where the door is or what?
I did not post because some teacher might think I answered and skip over the question.
That's all I needed to really know. I couldn't remember if it were 180 or 360, thanks.
To find the measurement of the third angle of a triangle, you can use the fact that the sum of all angles in a triangle is always equal to 180 degrees.
In this case, you already know that one of the angles is 90 degrees and the second angle is 30 degrees. Therefore, you can find the third angle by subtracting the sum of the first two angles from 180 degrees.
Let's calculate it:
Step 1: Add the first two angles together:
90 degrees + 30 degrees = 120 degrees
Step 2: Subtract the sum from 180 degrees:
180 degrees - 120 degrees = 60 degrees
So, the measurement of the third angle in this triangle is 60 degrees.
You can follow the same process for any triangle by summing the known angles and subtracting their sum from 180 degrees to find the measurement of the remaining angle.