Can someone please help me with the formula for the area of a triangle?

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2 Answers
Mar 15, 2018

#A = 1/2ab sinC#

Explanation:

This is simply a case of learning the correct formula for the area of a triangle.

You need to have the combination of three facts as
'Two sides and the included angle,"

Angle #C# lies between sides #a and b# and is therefore the included angle.

The correct formula is

#A = 1/2ab sinC# which is the last option offered,

Mar 15, 2018

The 5. answer

Explanation:

#A=1/2*h_b*b#
#h_b/a=sin(C)|*a#
#h_b=a*sin(C)#

#A=1/2a*b*sin(C)#