Heron’s formula and problem solving
Answers are for parents and teachers.
1
What is the area of the triangle with sides 9, 10, 17?
36
2
What is the area of the right triangle with legs 9 and 40?
180
3
What is the square of the altitude of an equilateral triangle with side 16?
192
4
What is the area of the triangle with sides 10, 17, 21?
84
5
When is Heron’s formula convenient? Write it in your own words.
When only the three sides of a triangle are known and no altitude is given.