A straight angle is 180 degrees. if you bisect it (cut it in half), you'll end up with two 90 degree angles, which are called right angles.
A = s^2
A' = 2s*s'
When the area is 36 cm^2, the side (s) is 6 cm. The area is increasing at the rate
A' = 2(6 cm)*(6 cm/s) = 72 cm^2/s
to do this just divide 9.56 by 4 to get $2.39
9: the answer is 4 to 13
10: the answer is 6 to 13
It takes Andre 1.25 minutes to swim a lap.
