Assertion: triangle's area | /r/HasProperty | derived
Facets:
value: from the formula for its height
type: OTHER
value: from the lengths of the sides
type: OTHER
Source sentences:
text: Therefore, the area can also be derived from the lengths of the sides.
text: The area T {\displaystyle T} of an isosceles triangle can be derived from the formula for its height, and from the general formula for the area of a triangle as half the product of base and height: