ANSWER: y=6
straight lines are 180° and all the angles in a triangle add up to 180°
Answer:

Step-by-step explanation:
we know that
The volume of the triangular prism of the figure is equal to

where
B is the area of the triangular base
h is the height of the triangular prism
Find the value of B

we have that

substitute the values and solve for h


We have the <span> Trigonometric Identities : </span>secx = 1/cosx; (sinx)^2 + (cosx)^2 = 1;
Then, 1 / (1-secx) = 1 / ( 1 - 1/cosx) = 1 / [(cosx - 1)/cosx] = cosx /
(cosx - 1 ) ;
Similar, 1 / (1+secx) = cosx / (1 + cosx) ;
cosx / (cosx - 1) + cosx / (1 + cosx) = [cosx(1 + cosx) + cosx (cosx - 1)] / [ (cosx - 1)(cox + 1)] =[cosx( 1 + cosx + cosx - 1 )] / [ (cosx - 1)(cox + 1)] = 2(cosx)^2 / [(cosx)^2 - (sinx)^2] = <span> 2(cosx)^2 / (-1) = - 2(cosx)^2;
</span>
Answer: 439.82
Step-by-step explanation:
C=2πr=2·π·70≈439.82297