- Step-by-step explanation: you have to find the sum for the question and find the answer to it by finding the sum.
c =
a
sin(α)
= 51.13963
b = √c2 - a2
= √51.1396257719972 - 82
= √2551.2613240999
= 50.51001
∠β = 90° - ∠α
= 81° = 1.41372 rad = 9/20π
area =
a × b
2
=
8 × 50.5100121174
2
= 202.04005
perimeter = a + b + c
= 8 + 50.5100121174 + 51.139625771997
= 109.64964
inradius =
a × b
a + b + c
=
404.0800969392
109.6496378894
= 3.68519
circumradius =
c
2
=
51.139625771997
2
= 25.56981