Step-by-step explanation:
if you're looking for x
x=180-42-51= 87°
and if you're looking for D
D= 180-42= 138°
Yes it is right because you are measuring by either the base to height or length times width
Answer: 131.1287 square mm (approx)
Step-by-step explanation:
The area of a triangle,

Where
and
are adjacent sides and
is the include angle of these sides,
Here PR and QR are adjacent sides and ∠R is the included angle of these sides,
Thus, we can write,
,
and
,
Thus, the area of the triangle PQR,


So you can play? I guess...
Y=6x+6 !! enjoy your dayy