Question

find the area of a triangle, sides of which are 10cm and 9cm and the perimeter 36cm

Answer 1

Answer:

36

cm

Using the formulas

A=s(s﹣a)(s﹣b)(s﹣c)

P=a+b+c

s=a+b+c

2

Solving forA

A=1

4﹣P4+4P3a+4P3b﹣4(Pa)2﹣12P2ab﹣4(Pb)2+8Pa2b+8Pab2=1

4·﹣364+4·363·10+4·363·9﹣4·(36·10)2﹣12·362·10·9﹣4·(36·9)2+8·36·102·9+8·36·10·92=36cm²

Answer 2

Sorry I don’t know the answer