Question

Line ab and cd (if presented in the picture) are straight lines. Find x (the pictures are not scaled)

Answer 1

x=42

Explanation:

Statement Reason

1. m∠AOB = 180° — Def. of straight ∠

2. m∠AOE + m∠EOF + m∠FOB = m∠

AOB —- Parts − whole Postulate

3. x + 2x+34° + 20° = 180° —- Substitution

4. x = 42°. —- Algebra

This is statement and reason! (no problem rsm people)

Answer 2

`x + 2x + 34 + 20 = 180`