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3 cards from this section. Quick, good the night before a test.
Calculate the semi-perimeter of a triangle with sides 10 cm, 5 cm, and 6 cm.
Remember to sum the sides and divide by 2.
What is the area of an equilateral triangle with each side 6 cm?
First find the semi-perimeter.
What is Heron's formula used for?
Think about what unknowns you have when dealing with a triangle.
True or False: The semi-perimeter is equal to the perimeter divided by 2.
Consider how semis relate to full values.
A triangle has sides of lengths 15 m, 20 m, and 25 m. Use Heron's formula to find the area. Then verify if it is a right-angled triangle.
Calculate the semi-perimeter first.
Given a triangle with sides 8 cm, 15 cm, and x cm. If the perimeter is 38 cm, find the value of x and the area of the triangle.
Remember to calculate the semi-perimeter.
6 more questions in this section. Enroll free to practise them all.
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