<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">adjustable triangles</topic></authority><related type="broader"><topic>drafting triangles</topic></related><variant type="other"><topic>adjustable triangle</topic></variant> <note xml:lang="en"><![CDATA[ Draftperson's triangles that include an adjustable arm to eliminate a  need of multiple triangles with fixed angles.  A protractor placed between the adjustable arm and the place where it is hinged assesses the angle of the clamped triangle. ]]></note></mads>