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Oksi-84 [34.3K]
3 years ago
13

Which figure has reflection symmetry?

Mathematics
2 answers:
mario62 [17]3 years ago
8 0

Answer with explanation:

The Meaning of the term Reflection Symmetry is that, the line which divides the geometrical shape into two congruent Parts.

First one is Isosceles Triangle, Second one is Trapezoid, Third one is Closed shape , fourth one appears Scalene Triangle.

There is no line in a trapezoid through which the two parts appear congruent to each other, neither that line can be found in closed curve nor in Scalene triangle.

But , if you draw a line through that vertex of Isosceles triangle where two equal congruent Sides intersect, then that line will be Reflection symmetry of line.

Option A

Finger [1]3 years ago
7 0

The first triangle does. That's the right answer.

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Answer:B: 36°


Step-by-step explanation:

We know that ∆ABC is isoceles, making (angle)<ABC and <BCA congruent because base angles of isoceles triangles are congruent.


Because we have parallel lines, we can look for alternate interior angle pairs. <BCA is congruent to <DAC because they're alternate interior angles.


If <BCA is x then so is <ABC.


Since triangles add up to 180° we can add all of the angles (3x+x+x) and set it equal to 180.

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If we were looking for <BAC we would plug that back in and solve, but we're looking for <BCA which is equal to x, therefore m<BCA=36°


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