Question

Tolong kak bantuannya.​

Answer 1

2х + х + 22 + х = 90

4х + 22 = 90

4х = 68

х = 17

∠CBD = 2 * 17 = 34°

∠DBE = 17 + 22 = 39°

∠ABE = 17°

∠ABD = ∠ABE + ∠DBE => 17° + 39° = 56°