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Mathematics Clinic => Pre-calculus => Topic started by: j.rubin on Mar 20, 2019

Title: If the three lengths of the sides of a triangle are known, Heron's formula can be used to find its ...
Post by: j.rubin on Mar 20, 2019

If the three lengths of the sides of a triangle are known, Heron's formula can be used to find its area. If a, b, and c are the three lengths of the sides, Heron's formula for area is:
A =
where s is half the perimeter of the triangle, or s = (a + b + c).
Use this formula to find the area of the triangle if a = 9 cm, b = 11 cm and c = 16 cm.

◦ 180 sq cm
◦ 18 sq cm
◦ 3 sq cm
◦ 18 sq cm

Title: If the three lengths of the sides of a triangle are known, Heron's formula can be used to find its ...
Post by: bdobbins on Mar 20, 2019

18 sq cm