What is the correct answer?

20

Step-by-step explanation:

A=30

Step-by-step explanation:

Solution

A=hbb/ 2=5·12/ 2=30

The area A of a triangle is given by the formula A=12bh where b is the base and h is the height of the triangle.

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47