Heloo i really need help! any helo would he appreciated!

What can be said about the relationship between triangles and circles? check all that apply. a) many circles can be inscribed in a given triangle b) exactly one triangle can be inscribed in a given circle c) exactly one circle can be inscribed in a given triangle d) many triangular shapes can be circumscribed about a given circle

Select the lengths in centimeters that would form a right triangle

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!