Can a right triangle be an isosceles triangle? a: always b: never c: sometimes

Yes, a right triangle can be an isosceles triangle sometimes.
C.

An isosceles triangle is a triangle with two or more sides of the same length. A right triangle is a triangle that has a right angle, therefore it is possible to have a right isosceles triangle.

7a is true,7b is false,7c is true,7d is false.

Step-by-step explanation:

hope that helps :)