The area 𝒜 of a triangle with sides of lengths a and b and with included angle 𝜃 is given by the formula 𝒜 = ______ .

Question

The area 𝒜 of a triangle with sides of lengths a and b and with included angle 𝜃 is given by the formula 𝒜 = ______  . So the area of the triangle with sides 4 and 5 and included angle 𝜃 = 30°

 is_____

Answer 1

area= 1/2 x ab x sine of the included angle

A= 1/2 x 4 x5 x sin30= 5