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2 cards from this section. Quick, good the night before a test.
Calculate the area of a triangle with sides 6 cm, 8 cm, and 10 cm.
Find the semi-perimeter first.
What is the semi-perimeter of a triangle with sides 5 m, 12 m, and 13 m?
Add the three sides and divide by two.
What does Heron's Formula calculate?
Recall the purpose of the formula from our discussions.
True or False: Heron's Formula only works for right triangles.
Think about the types of triangles we have discussed.
A triangle has sides 15 m, 20 m, and 25 m. Is it right-angled? Calculate area using Heron’s formula and then verify with the Pythagorean theorem.
First, calculate semi-perimeter, then area.
The sides of a triangle are a = 5x, b = 6x, c = 7x and the perimeter is 540 m. Find the area of the triangle.
Use the ratio to find individual sides before calculating area.
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