Name the following angles of Fig., using three letters: (a) ∠1 (b)

1.	Name the following angles of Fig., using three letters: (a) ∠1 (b) ∠2 (c) ∠3 (d) ∠1 + ∠2 (e) ∠2 + ∠3 (f) ∠1 + ∠2 + ∠3 (g) ∠CBA – ∠1
Answer» (a) ∠1 = ∠CBD (b) ∠2 = ∠DBE (c) ∠3 = ∠EBA (d) ∠1 + ∠2 = ∠CBD + ∠DBE = ∠CBE (e) ∠2 + ∠3 = ∠DBE + ∠EBA = ∠DBA (f) ∠l + ∠2 + ∠3 = ∠CBD + ∠DBE + ∠EBA = ∠CBA (g) ∠CBA – ∠1 = ∠CBA – ∠CBD = ∠DBA

Name the following angles of Fig., using three letters: (a) ∠1 (b) ∠2 (c) ∠3 (d) ∠1 + ∠2 (e) ∠2 + ∠3 (f) ∠1 + ∠2 + ∠3 (g) ∠CBA – ∠1

Answer»

(a) ∠1 = ∠CBD

(b) ∠2 = ∠DBE

(d) ∠1 + ∠2 = ∠CBD + ∠DBE = ∠CBE

(e) ∠2 + ∠3 = ∠DBE + ∠EBA = ∠DBA

(f) ∠l + ∠2 + ∠3 = ∠CBD + ∠DBE + ∠EBA
= ∠CBA

(g) ∠CBA – ∠1 = ∠CBA – ∠CBD = ∠DBA