The answer is b to be sure
Answer:
A) 150
Step-by-step explanation:
All the angles in a triangle must add up to a total of 180 degrees.
So we can make an equation as given below:
20+10+?=180
30+?=180
?=150
So the missing angle is 150 degrees
If you take the 6 and subtract it by 2 you will get 4
The answer is 246 units²
<span>Surface area= 2(lw + lh + wh)</span>