Answer:
A. Obtuse B. Right C. Acute D. Acute Hope this helps :)
Answer:
D
Step-by-step explanation:
780 handshakes.
(n(n-1))/2
(40(40-1))/2
(40*39)/2
1560/2
780
Answer:
6.8 inches
Step-by-step explanation:
Given data :
m∠ A = 53° , m∠ C = 84° , side a = 8 inches
therefor m ∠ B = ( 180 - (84 + 53 )) = 43°
<u>Find the length of side b </u>
we will apply sine rule here

=
= 
∴ b = ( sin43° * 8 ) / sin53°
= ( 0.6819 * 8 ) / 0.7986
= 5.4552 / 0.7986 = 6.83 ≈ 6.8 inches