Find the perimeter of this quarter circle with radius, r
= 38mm.
Give your answer as an expression in terms of
π
.PLEASE HELP I NEED THE ANSWER ASAP

19 + 76 mm

Step-by-step explanation:

First, use the circumference formula to find the perimeter of the entire circle:

c = 2r

c = 2(38)

c = 76

Divide this by 4, since the question asks for the perimeter of the quarter circle:

76/4

= 19

19 is the arc length section of the perimeter. The length of the other 2 sides of the perimeter, formed by the radius, can be found by doubling 38.

38(2) = 76

Add this to 19:

19 + 76

So, the expression is 19 + 76 mm

4537.96 mm

Step-by-step explanation:

Formula =

+ 2r

=

1/2 × 22/7 × 38mm

= 59.71

One place of decimal = 59.7mm

Now we will add the 2r having

59.7 +2(38mm)

= 4537.96mm

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92