Question

Question is in the picture.

Answer 1

AD = 10

Explanation:

Find AE.

AE = (AB - DC) / 2

AE = (24 - 12) / 2

AE = 12 / 2

AE = 6

Pythagorean theorem

a² + b² = c²

AE² + DE² = AD²

6² + 8² = AD²

36 + 64 = AD²

100 = AD²

√100 = AD

10 = AD