The answer is 60 because
40-10*2=60
hope it helps
Answer:
<u><em>O D) 540°</em></u>
Step-by-step explanation:
<em>The internal angle sum of a pentagon is 540°.</em>
<em>No shape has an internal angle sum of 90°, 180° is angle sum of a triangle, and 360° for a quadrilateral.</em>
<em></em>
<em>Hope it helps.</em>
<em>;)</em>
<em><3</em>
Answer:
-2±2i√5 / 3
Step-by-step explanation:
You can't factor this equation, so you use the quadratic formula to solve it, which is
-b±√b-4ac/2a
Answer: 5(√3-1) unit.
Step-by-step explanation:
Since, By the below diagram,
For triangle BDC,
We can write,

⇒ 
⇒ 
⇒ 
⇒ 
Now, In triangle ADC,

⇒ 
⇒ 
⇒ 
⇒ 
⇒ 