Identify the geometric shapes and any given measurements.

Geometric Analysis:

• The image displays a triangle labeled with vertices A, M, and B.
• The base of the triangle, segment AB, has a length of 15 units.
• There are angle markings at vertices A and B, indicating that these angles are equal.
• There is a right angle symbol at vertex M, indicating that the angle $$\angle AMB$$ is 90 degrees.

Summary: The figure is an isosceles triangle (due to equal base angles) with a right angle at vertex M and a base length of 15.