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 ...

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.

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.