A square minus triangle is equal to 10, three triangles are equal to a square, find the square is equal to (?), find the triangle is equal to (?)?

A square minus triangle is equal to 10, three triangles are equal to a square, find the square is equal to (?), find the triangle is equal to (?)?

Square equals 15, triangle equals 5, square triangle = 10, 3 × triangle = square, that is 3 × triangle triangle = 10, that is 2 × triangle = 10, triangle = 5, that is 3 × 5 = 15, square = 15