Answer:
2^2×20
Step-by-step explanation:
2^2×20
because 2×20=40
so, 2^2×20=2^40
Answer:
x=
Step-by-step explanation:
2nd step: 
third step: 
fourth step: 
answer: x=
Answer:
D
Step-by-step explanation:
not completely sure though
Assuming that is the circumradius:
Polygon Area = [r^2 * n * sin (360 / n)] / 2
Polygon Area = (25 * 20 * sin (18)) / 2
Polygon Area = (500 * 0.30902) / 2
Polygon Area =
<span>
<span>
<span>
77.255
</span>
</span>
</span>
Can't answer 1-6 cause I have no idea what you need
7) A triangle with two congruent sides is isosceles.
8)
and 
9) 
10) 
11) 
12) isosceles triangle