Find the volume pls and show your work thanks

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Can someone check if i did this correct. it’s number 4 if you’re wondering.