Question

question 1 (multiple choice worth 1 points) (transformations lc) which figure has reflectional symmetry?

Explanation:

Step1: Recall the definition of reflectional symmetry

Reflectional symmetry means that a figure can be divided into two congruent parts by a line of symmetry.

Step2: Analyze each figure

• The first figure (triangle): If it is an isosceles triangle (judging from the markings), it has a line of symmetry.
• The second figure (quadrilateral): It is a trapezoid (non - isosceles), no line of symmetry.
• The third figure (parallelogram): A general parallelogram has no line of symmetry (except for special cases like a rhombus, rectangle, square which are not indicated here).
• The fourth figure (pentagon): If it is a regular pentagon (judging from the markings), it has multiple lines of symmetry.

Answer:

The first figure (triangle) and the fourth figure (pentagon) have reflectional symmetry. But if we assume the first is an isosceles triangle (common in such problems without more specific info) and the fourth is a regular pentagon (by equal markings), both are correct. However, if we consider the most basic case taught in initial symmetry lessons (isosceles triangle as a simple example), the first figure (triangle) is a likely answer. But if the pentagon is regular (implied by equal side markings), the fourth figure (pentagon) also has reflectional symmetry. If only one can be chosen (common in some tests where triangle is a basic example), the first figure (triangle). But strictly by definition, both (if pentagon is regular) have reflectional symmetry.

If we assume standard multiple - choice (one answer) and basic level (triangle as a simple symmetric figure), the answer is the first figure (triangle). But if all markings imply regularity (for pentagon) and triangle is isosceles (from side markings), both are correct. Since the problem is labeled "Transformations LC" (likely basic), the first figure (triangle) is a common first - taught symmetric figure.