Answer:
Acute
Explanation:
To determine the type of triangle with angle measurements of 31°, 79°, and 70°, we need to add the three angles together to see if the sum is 180°, which is the total angle measure for a triangle.
31° + 79° + 70° = 180°
Since the sum of the angles is 180°, this is a valid triangle. Now, we can determine the type of triangle by looking at the size of its angles:
An acute triangle has all angles less than 90°.
An obtuse triangle has one angle greater than 90°.
A right triangle has one angle that is exactly 90°.
In this case, all three angles are less than 90°, so this is an acute triangle.