4. Estimate the size of each of these angles. Check your estimate by measuring them with your protractor.
a) b) c)
d)
e)
5. Draw these angles using a pencil, ruler and protractor.
When drawing angles, remember: Draw 1 line of the angle with a ruler. Place the baseline of the protractor on this line, with the centre point on the end of the line.
Follow the scale to the angle you want and mark this point. Join this point to the end of your line.
a) 50° e) 70°
b) 160° f) 135°
b)
c) 85° g) 40°
6. Work out the missing angles in each of these triangles. a)