Question

Hello help please

Answer 1

a right angle is 90°, or 1/4 of a circle.

3/5 * 1/4 = 3/20

radian measure is the length of the circumference of this part of the circle.

a full circumference of a circle would be 2*pi*r, also expressed as 2 rad * r

now let's multiply the full thing with the 3/20 from earlier to just get the desired fraction:

6/20 rad * r

= 3/10 rad * r

of course a solution in cm or inch still depends on the radius here, wich could be just plugged in at will

Answer 2

Answer:

$\frac{3\pi }{10}$

Step-by-step explanation:

To express degrees in radians

radian measure = degree measure × $\frac{\pi }{180}$

$\frac{3}{5}$ of a right angle

= $\frac{3}{5}$ × 90° = 54° , then

radian = 54 × $\frac{\pi }{180}$ = $\frac{54}{180}$ × π = $\frac{3}{10}$ × π = $\frac{3\pi }{10}$