Answer:
steps below
Step-by-step explanation:
1. It can be formed a triangle: sum of any two sides is greater than the 3rd side
2. It can't be an obtuse triangle: 5² + 7² = 74 < 10²
the triangle is an obtuse-angled triangle if the square of the longest side (c²) is greater than the sum of the square of other two sides (c²>a²+b²)
100
15:3, 15 to 3, 15/3 = 5
A. Triangle B
Obtuse angles are greater than 90°, but less than 180°.
I am joyous to assist you anytime.
