Answer:
65.46 units
Step-by-step explanation:
Given the information:
- The vertex angle of an isosceles triangle measures 26°
=> the leg angle is:
= (180° - 26° )/2
= 77°
- The base is 30 units
Let x is the length of the leg side (x>0)
We use cosine law to find x, we have:
=
Because the isosceles has two equal leg sides
<=> = 2
- 1.79
<=> 0.21 =
<=>
<=> x = 65.46 units
Hope it will find you well.