14. The ratio of the angles in a triangle is 3:10:7. What is the measure of the middle sized angle?
*
9
27
63
90
The total sum of the angles in a triangle is 180 degrees.
Let the angles be 3x, 10x, and 7x.
Therefore, 3x + 10x + 7x = 180
20x = 180
x = 9
The middle-sized angle is 10x = 10 * 9 = 90 degrees.
Therefore, the measure of the middle-sized angle is 90 degrees.
Answer: 90