Question

The triangle shon below has an area of the 75 units^2

Answer 1

Apply Pythagorean theorem first

`\\ \rm\rightarrowtail b^2=11^2-10^2`

`\\ \rm\rightarrowtail b^2=121-100`

`\\ \rm\rightarrowtail b^2=21`

`\\ \rm\rightarrowtail b=4.2\approx 4units`

Now

`\\ \rm\rightarrowtail (1)/(2)(x)(10)=75`

`\\ \rm\rightarrowtail 5x=75`

`\\ \rm\rightarrowtail x=15units`