Answer:
a is the answer, also it's true.
Answer:
<u>Question (a)</u>
Midpoint of a line segment:

Given:

Given:

<u>Question (b)</u>
Find slopes (gradients) of JL and MK then compare. If the product of the slopes of JL and MK equal -1, then JL and MK are perpendicular.

Given:

Given:


Hence segments JL and MK are perpendicular
Answer:
closed, or shaded, circle is used to represent the inequalities greater than or equal to (≥) or less than or equal to (≤) . The point is part of the solution. An open circle is used for greater than (>) or less than (<). The point is not part of the solution.
Answer:
the top one
because identity of addition is adding 0