There's no dividing the angle in half in the trig triangle area formula.
Area = (1/2) ab sin C = (1/2) ac sin B = (1/2) bc sin A
Answer: check second and third choices
Answer: a
Step-by-step explanation:
Answer: the shaded region = 69.66mm^2
Explanation:
Assume shaded region is X
Then :
X + Area of circle = area of square
X = area of square - area of circle
Find area of square:
Side length = 18mm
Area = 18 x 18 = 324
Find area of circle:
Side length of a square = the diameter of the circle = 18mm
And r(radius) = d/2 = 18/2 = 9
Area = pi x 9^2 = 254.34
Now find X
X = 324 - 254.34 = 69.66
