Question

What is the value of side "a" in the triangle shown below?

(sqrt) 10
(sqrt) 5
7
5
3

Answer 1

I hope this helps you



it's right angle



30-60-90


30 k


60 k square root of 3


90 2k



2k=10


k=5


a=5

Answer 2

sin 30 = a/10
a = 10 sin 30 = 10(1/2) = 5

Therefore, a = 5.