Question 3. Three straight lines meet at a point. d 61° b a 46° Calculate the values of a, b, c and d. Give reasons for your answers.
Question 4. There are two parallel lines in this diagram. One angle is 42° Write in the size of all the other angles.
Question 5. Work out the unknown angles a, b and c. 113°
Question 6. Lines WX and YZ are parallel. W Y C b a 77° X Z One angle is 77°. Find a, b and c.
