Question

state an equation that can be used to find the missing length for each triangle

Answer 1

4²+7²=x²
√{4²+7²} =x is the equation

√{16+49}
√65

Answer 2

IN THE GIVEN FIG. IT IS A RIGHT ANGLED TRIANGLE .
BY PYTHAGORAS THEOREM
x=
$\sqrt{4 { }^{2} + 7 {}^{2} }$