6. Below is an aerial image of the runways at Logan international Airport, Boston, USA.
Runways 22R and 22L are parallel runways. The acute angle between runways 15R and 22L is 78°, as indicated in the diagram.
22R 22L 15R
Find the following angles. (i)
|∠A| A B C E 78° D
(ii) |∠B| (iii) |∠C| (iv) |∠D| (v)
|∠E|
7. Below is a picture of road markings. Both pairs of lines are parallel and one angle of 64° is marked. A A C 64° 64° B
Find the following angles. (i)
|∠A|
(ii) |∠B| (iii) |∠C|
Revision questions
11A Core skills 1. Copy the diagrams of two parallel lines and a transversal. (i) Mark in two pairs of alternate angles. (ii) Use a protractor to measure the alternate angles. (iii) What do you notice about the alternate angles?