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3 cards from this section. Quick, good the night before a test.
Find the area of an equilateral triangle with side 9 cm using Heron's formula.
Calculate s first and then find the area.
What is the semi-perimeter of a triangle with sides 6 cm, 8 cm, and 10 cm?
Add all sides and divide by 2.
What is Heron's formula used for?
Focus on the purpose of the formula.
True or False: Heron's formula can only be used for right-angled triangles.
Consider the types of triangles this formula can solve for.
A triangle has sides measuring 15 cm, 36 cm, and 39 cm. Calculate the area using Heron's formula.
Remember to calculate s first followed by the area.
Find the area of a triangle with sides in the ratio 5:12:13 and a perimeter of 60 cm.
Resolve the side lengths using the ratio and perimeter before substitution.
5 more questions in this section. Enroll free to practise them all.
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