A diagonal scale and scales for dividing the inch into 10, 12, and 16 parts appear in the interior of the protractor. A celluloid arm is attached at the vertex of the protractor. Users were to set ...

KS2 Maths Lines and angles learning resources for adults, children, parents and teachers. ... Learn how to draw and measure angles up to 180 degrees using a protractor.

260° You need to read the outside scale. One line is lined up with 0° and the other line on the angle reaches 260 on the protractor. This is a reflex angle.