What’s the perimeter and area of the triangle above?

Hello from MrBillDoesMath!

Perimeter =  18 cos(42) + 18 sin(42) + 18

Area =  162 * sin(42) cos(42)

Discussion:

x = 18 * cos(42) and y = 18 sin(42)  so...

Perimeter = x + y + 18 =

                    18 cos(42) + 18 sin(42) + 18    which is approx

                    18 (.743) + 18 (.669) + 18  = 43.42

Area =  (1/2) bh = (1/2) yx =

                          = (1/2) ( 18 sin(42)) (18 cos(42))

                          = (1/2) (18*18) sin(42) cos(42)

                          = (324/2) sin(42) cos(42)

                          = 162 * sin(42) cos(42)

which is approx

                          = 80.56

Thank you,

MrB

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.