Question

question find m∠jlk.

Explanation:

Step1: Identify triangle type

The marks on the sides indicate that $\triangle{JLK}$ is isosceles, so $\angle{J}=\angle{K} = 45^{\circ}$.

Step2: Use angle - sum property

The sum of interior angles of a triangle is $180^{\circ}$. Let $m\angle{JLK}=x$. Then $x + 45^{\circ}+45^{\circ}=180^{\circ}$.

Step3: Solve for $x$

$x=180^{\circ}-(45^{\circ} + 45^{\circ})=90^{\circ}$.

Answer:

$90^{\circ}$