Find value of k from below eqn

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.

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

Aline that intersects one of two parallel lines intersects the other also always sometimes never