Check the picture below.
doesn't that make it just a 20 x 14? well, surely you know what that area is.
Equilateral means that the 3 sides are equal length. For this to happen, the triangle needs to also have 3 equal angles, but it is mentionned that it has an obtus angle, therefore, not all angles are the same, meaning the 3 sides also aren't equivalent.
the triangle isn't equilateral
Answer: 100
Step-by-step explanation:

3 x 25 = 75
4 x 25 = 100
Answer:312
Step-by-step explanation: multiply 6*4*13