math HELP!
posted by Kat .
nobody has answered yet and this is the only question I need :(
If angle A=30* and side b=4.0 km, how do I find side c?
I know that this is a 306090 triangle but I don't know how to find the hypotenuse. please help!

Since angle B is 60 degrees, and A is less (30 degrees) the law of sines says that the length of side a is less than that of side b. The length of side c is given by the lasw of sines:
c/sin 90 = c = b/sin60
c = 4.0/0.866 = 4.619 km
Respond to this Question
Similar Questions

math pls
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P. (d) Find the sizes of the other two angles of triangle PQR. (e) Find the length of the median drawn to side PQ. (f) Find … 
geometry/math pls help
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P. (1) Find the sizes of the other two angles of triangle PQR. (2) Find the length of the median drawn to side PQ. (3) Find … 
Geometry
One side of a triangle is x inches longer than another side. The ray bisecting the angle formed by these sides divides the opposite side into 3inch and 5inch segments. Find the perimeter of the triangle in terms of x. ( triangle … 
math
One side of triangle is 10 centimetres, two angles next to that side are 30° and 60°. I need to find all three angle bisectors of triangle. 
math (algerba 1)
Right Angle Triangle: side A ? side B 3 square root side C 2m How would i find side a 
algebra
angles of a triangle The second angle of a garden triangle is four times as large as the first. the third angle is 45 degrees less than the sum of the other two angles. find the measure of each angle. 15 x 4=60 x 3 = 180 side a=15 … 
Math help!
Which of the triangles described in the table is a right triangle. Table Triangle Q, Side 1=25 Side 2=10 Side 3=15. Triangle R, Side 1=26 Side 2=20 Side 3=46. Triangle S, Side 1=25 Side 2=20 Side 3=1,025. Triangle T, Side 1=25 Side … 
Math
Which of the triangles described in the table is a right triangle. Table Triangle Q, Side 1=25 Side 2=10 Side 3=15. Triangle R, Side 1=26 Side 2=20 Side 3=46. Triangle S, Side 1=25 Side 2=20 Side 3=1,025. Triangle T, Side 1=25 Side … 
Math
1. If Angle ABC is congruent to Angle DEF by sidesideside triangle congruence, the angle B is congruent to Angle E by? 
Math
I NEED TO KNOW HOW TO DO THE WORK FOR THIS QUESTION!!!!!!!!!!!!!!!!!!! Find the length of each side(triangle) first sidex second sidex+2 third sidex+3 Perimeter=35m "answer = 10m, 12m, 13m" ^^^^how do you get this?