An obtuse triangle has measurements of 100°,60° and 20°. if the longest side of this triangle is 20ft what is the length of the shortest side?

The longest side of a triangle is always opposite the largest angle of a triangle.

If the smallest angle of the triangle is 20 degrees, then the shortest side is opposite to it. Using this information, we can form the equality

20/100(longest leg/biggest angle) = x/20(shortest leg/smallest angle)

We can cross multiply this to get 400 = 100x. From here it is a simple "find x" and the shortest side is 4 feet.

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

the first option is the answer.