lǎo / shī / ràng / wǒ / men / huà / yí / ge / děng / yāo / sān / jiǎo / xíng / bìng / biāo / chū / liǎng / tiáo / xiāng / děng / de / biān

老师让我们画一个等腰三角形，并标出两条相等的边。

The teacher asked us to draw an isosceles triangle and mark its two equal sides.