Given:
The isosceles triangle.
Required:
Isosceles triangles can be acute or obtuse.
Step-by-step explanation:
You can three types of isosceles triangles:
acute-angled isosceles triangle
All the angles are acute and the base angles are equal.
eg:
75°,75°,30° or 50°,50°,80°
right-angled isosceles triangle
One angle is
90° and the other two are both 45°
45° , 45°, 90° ← (like one of the usual set squares)
obtuse-angles isosceles triangle
One angle is obtuse and the base angles are equal.
eg:
30° ,30°, 120°or 25°, 25°, 130°
Answer:
An isosceles triangle can be acute or obtuse.