Answer:
c =
km
Step-by-step explanation:
Here's the required formula to find the missing side of triangle by pythagoras theorem :
![{\longrightarrow{\pmb{\sf{{(a)}^{2} + {(b)}^{2} = {(c)}^{2}}}}}](https://tex.z-dn.net/?f=%7B%5Clongrightarrow%7B%5Cpmb%7B%5Csf%7B%7B%28a%29%7D%5E%7B2%7D%20%2B%20%7B%28b%29%7D%5E%7B2%7D%20%3D%20%7B%28c%29%7D%5E%7B2%7D%7D%7D%7D%7D)
a = 20 km
b = 21 km
c = ?
Substituting all the given values in the formula to find the third side of triangle :
![\begin{gathered} \quad{\longrightarrow{\sf{{(a)}^{2} + {(b)}^{2} = {(c)}^{2}}}} \\ \\ \quad{\longrightarrow{\sf{{(20)}^{2} + {(21)}^{2} = {(c)}^{2}}}} \\ \\ \quad{\longrightarrow{\sf{(20 \times 20) + (21 \times 21) = {(c)}^{2}}}} \\ \\ \quad{\longrightarrow{\sf{(400) + (441) = {(c)}^{2}}}} \\ \\ \quad{\longrightarrow{\sf{400 + 441 = {(c)}^{2}}}} \\ \\ \quad{\longrightarrow{\sf{841= {(c)}^{2}}}} \\ \\ \quad{\longrightarrow{\sf{c = \sqrt{841}}}} \\ \\ \quad{\longrightarrow{\sf{\underline{\underline{\purple{c = 29 \: km}}}}}}\end{gathered}](https://tex.z-dn.net/?f=%20%5Cbegin%7Bgathered%7D%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7B%7B%28a%29%7D%5E%7B2%7D%20%2B%20%7B%28b%29%7D%5E%7B2%7D%20%3D%20%7B%28c%29%7D%5E%7B2%7D%7D%7D%7D%20%5C%5C%20%20%5C%5C%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7B%7B%2820%29%7D%5E%7B2%7D%20%2B%20%7B%2821%29%7D%5E%7B2%7D%20%3D%20%7B%28c%29%7D%5E%7B2%7D%7D%7D%7D%20%5C%5C%20%20%5C%5C%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7B%2820%20%5Ctimes%2020%29%20%2B%20%2821%20%5Ctimes%2021%29%20%3D%20%7B%28c%29%7D%5E%7B2%7D%7D%7D%7D%20%5C%5C%20%20%5C%5C%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7B%28400%29%20%2B%20%28441%29%20%3D%20%7B%28c%29%7D%5E%7B2%7D%7D%7D%7D%20%5C%5C%20%20%5C%5C%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7B400%20%2B%20441%20%3D%20%7B%28c%29%7D%5E%7B2%7D%7D%7D%7D%20%20%5C%5C%20%20%5C%5C%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7B841%3D%20%7B%28c%29%7D%5E%7B2%7D%7D%7D%7D%20%5C%5C%20%20%5C%5C%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7Bc%20%3D%20%20%5Csqrt%7B841%7D%7D%7D%7D%20%5C%5C%20%20%5C%5C%20%5Cquad%7B%5Clongrightarrow%7B%5Csf%7B%5Cunderline%7B%5Cunderline%7B%5Cpurple%7Bc%20%3D%2029%20%5C%3A%20km%7D%7D%7D%7D%7D%7D%5Cend%7Bgathered%7D)
Hence, the length of missing side of triangle is 29 km.
![\rule{300}{2.5}](https://tex.z-dn.net/?f=%5Crule%7B300%7D%7B2.5%7D)
Answer:
Step-by-step explanation:
Answer:
Where something is located
Step-by-step explanation:PLS GIVE ME BRAINLIEST
Answer:
= 330/1 ÷ 3/4
= (330 × 4) / (3 × 1)
= 1320/3
= 440/1
<span>= 440
Hope this helps! </span>
Answer:
if it was 50% off the cost would be $145.64
Step-by-step explanation:
291.29 / 1/2= 145.64
50% = 1/2