This is Complementary angle
Measure of Complementary angles is 90°





Answer:
the midpoint would be:(0,5)
Step-by-step explanation:
40R3 it 40r3the answer is
We can dig out the soil from the well equal to volume of well.
Height(h) of well is = 15 meters.
Diameter = 1.6 meters.
So radius(r) =

meter.
As well in cylindrical shapes.
So volume of well =

=

In general

So volume of well is =

cubic meter.
So we can dig out 30.144 cubic meter soil from well.
It's might be.....180,000 I'm sure