Question

What is mABC if ABCD is a rhombus? ​

Answer 1

72°

Explanation:

If ABCD is a rhombus, then m∠ADB = m∠DBC = 36°

ΔADB is an isosles triangle, so m∠ABD = m∠ADB = 36°

Then m∠ABC = m∠ABD + m∠DBC = 36 + 36 = 72°