An amount given as a whole number and a fraction

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

What is the approximate circumference of the circle shown below?

What other information do you need to prove triangle dac=bca by asa