Answer:
The correct option id D. Both triangles have an obtuse angle.
Explanation:
Isosceles triangle: If two sides of a triangle are same then it is called an isosceles triangle.
Right angle triangle: If measure of one angle is 90 degree then it is called an right angle triangle.
Acute angle: The measure of angle is less than 90 degree.
Obtuse angle: The measure of angle is more than 90 degree.
From the given figure it is noticed that the measure of one angle in both triangles are more than 90 degree, therefore both triangles have an obtuse angle.
Option D is correct.