Assertion: right triangle's angle | /r/HasProperty | labeled ∠ b
Facets:
Source sentences:
text: If the three angles of the triangle are labeled ∠ A, ∠ B and ∠ C, then the three sides of the triangle should be labeled as a, b, and c. Figure 1 illustrates how lowercase letters are used to name the sides of the triangle that are opposite the angles named with corresponding uppercase letters.