There is no real shortcut in learning integration formulas. You should take time learning and understanding how the formulas are derived until you are familiar with the formulas and you can easily recall the formulas. Hope this answers the question.
Answer: perimeter = 62
Step-by-step explanation:
To determine the length of the unknown sides of the triangle, we would apply the sine rule which is expressed as
a/SinA = b/SinB = c/SinC
Therefore
AB/Sin 40 = 19.5/Sin 49
ABSin49 = 19.5Sin40 = 19.5 × 0.64
0.755AB = 12.48
AB = 12.48/0.755
AB = 16.5
The sum of the angles in a triangle is 180°. Therefore,
A = 180 - (40 + 49) = 91°
BC/Sin 91 = 19.5/Sin 49
BCSin49 = 19.5Sin91 = 19.5 × 0.9998
0.755BC = 19.5
BC = 19.5/0.755
BC = 25.8
The formula for determining the perimeter of a rectangle is expressed as
Perimeter = a + b + c
Where
a, b and c represents the length of each side of the triangle.
Perimeter of triangle = 25.8 + 16.5 + 19.5 = 62
45+15+25=85
100-85=15
Answer: 15% of people prefer neither coffee or juice
