The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to the nearest hundredth. A calculator may be helpful.

a = ?, b = 13, c = 21

15.83
15.87
16.19
16.49

Question

The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to the nearest hundredth. A calculator may be helpful.

a = ?, b = 13, c = 21

15.83
       15.87
       16.19
       16.49

anonymous · Answer

quadratics to triangles in one step
must be an on line class....

anonymous · Answer

16.49?

anonymous · Answer

$$a^2+b^2=c^2$$ is the conclusion of pythagoras the one theorem everyone knows 
so 
$$a^2+13^2=21^2$$  you gotta solve for $a$

anonymous · Answer

You have to use the Pythagorean theorem

anonymous · Answer

yeah you got it

anonymous · Answer

thanks