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

$\\ \rm\rightarrowtail \dfrac{1}{2}(x)(10)=75$

$\\ \rm\rightarrowtail 5x=75$

$\\ \rm\rightarrowtail x=15units$