Monday, November 19, 2012

Textbook question 31 a)


The area of a triangle can be determined using Heron's formula, which requires the side lengths of the triangle.
Heron's formula is A=√s(s-a)(s-b)(s-c). In the formula A is the area; a,b and c are the side lengths; and s is half the perimeter or a+b+c.
Determine the area of each triangle with the following side lengths. 
Express each area to the nearest tenth of a square centimetre.

a) 15cm, 12cm, 10cm



a,b,c=side lengths

s= half the perimeter  















A= 59.81168364 

we have to round it to the nearest tenth of a square centimetre. 

so it's going to be 59.8cm2 


No comments:

Post a Comment