which statement explains why one of these triangles is a right triangle? HELP ME!!

Answer:
Triangle B
Step-by-step explanation: Look at the square figure on one of the corners. That means that your triangle is a right triangle, which means, its measurement on that corner is 90 degrees
Answer:
Triangle B has a right angle because it is on the corner and the right angle is a perfect square.
right angle=to 90 degrees
Hope that was helpful.Thank you!!!