三角形的符号可以用word上的特殊符号打出来，再粘贴过来。也可以复制我的这个符号，空心的“△”或者实心的“▲”。使用你的输入法也是可以打出来的，比如你直接用输入法打字“三角形”，就会出现对用的三角形的符号了，希望可以帮到你。
▲Black Up-pointing Triangle△White Up-pointing Triangle▴Black Up-pointing Small Triangle▵White Up-pointing Small Triangle▶Black Right-pointing Triangle▷White Right-pointing Triangle▸Black Right-pointing Small Triangle▹White Right-pointing Small Triangle▼Black Down-pointing Triangle▽White Down-pointing Triangle▾Black Down-pointing Small Triangle▿White Down-pointing Small Triangle◀Black Left-pointing Triangle◁White Left-pointing Triangle◂Black Left-pointing Small Triangle◃White Left-pointing Small Triangle◢Black Lower Right Triangle◣Black Lower Left Triangle◤Black Upper Left Triangle◥Black Upper Right Triangle◬White Up-pointing Triangle With Dot◭Up-pointing Triangle With Left Half Black◮Up-pointing Triangle With Right Half Black⛛Heavy White Down-pointing Triangle