A triangle has three interior angle measures; x is the largest angle, y is the next largest angle, and z is the smallest angle.

The measure of the largest angle is 40 degrees less than the sum of the measure of the other two angles.
The largest angle is twice the smaller angle minus 30 degrees.
The sum of the triangle's interior angles is x + y + z = 180.

Which two equations represent the remaining angle relationships?

Select each correct answer.
1) x=y−z+40
2) x=2z−30
3) x=y+z−40
4) x=30−2z
5) x = y + z + 40



Answer :

The correct answer would be option 2 and 3:

  • 2) x=2z−30
  • 3) x=y+z−40

How to solve for the angles

We have to sove the problem by carefully trying to understand the statements

x = largest angle

y =  next largest angle

z = smallest.

1. For the first statement: The measure of the largest angle is 40 degrees less than the sum of the measure of the other two angles.

largest angle < y + z

This would be represented as

x = y + z - 40

2. The largest angle is twice the smaller angle minus 30 degrees.

This is represented as

2 times of smallest = 2 * z = 2z

minus 30 degrees = 2z - 30

Hence the solutions to the question from the option that we have would be the options

  • 2) x=2z−30
  • 3) x=y+z−40

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