Question

Please I don’t understand this and I need help!

Answer 1

tanA=5/12

`\\ \sf\longmapsto (a)/(b)=(5)/(12)`

`\\ \sf\longmapsto (a)/(2)=(5)/(12)`

`\\ \sf\longmapsto 12a=10`

`\\ \sf\longmapsto a=(10)/(12)`

`\\ \sf\longmapsto a=8.3`

`\\ \sf\longmapsto a\approx 8`

Now apply pythagorean triplet

`\\ \sf\longmapsto a^2+b^2=c^2`

`\\ \sf\longmapsto c^2=8^2+2^2`

`\\ \sf\longmapsto c^2=64+4`

`\\ \sf\longmapsto c^2=68`

`\\ \sf\longmapsto c=8.4`