I know the answer to the question. It’s just whenever I answer the reason for my answer it gets no marks. Can someone explain how I’m suppose to answer this question? This is a 3 mark question.

x = 60°

Step-by-step explanation:

The triangle has 3 congruent sides and is equilateral with 3 congruent angles each of 60°

x and the base angle of the triangle are alternate angles and are congruent, so

x = 60°

x = 60°

Step-by-step explanation:

Know that the opposite interior angles of parallel lines have equal measurements. In other words, angle x is equal to the bottom-left angle of the triangle. And note that the triangle has 3 sides of the same length, so all 3 angles have the same measurement (i.e. this is a regular triangle). Since the measure of a single interior angle of a regular triangle is 60°, x is also 60°.