1. Which figure has reflection symmetry?
2 answers:
Answer:
1. Option C
2. Option A and Option D.
Step-by-step explanation:
Reflective symmetry:
If a figure is reflected across a line such that the reflected figure is exactly the same as the original and the same distance from the line, then the line is called axis of symmetry.
If a figure has at least one line of symmetry, then the figure has Reflective symmetry.
In part 1, only figure C has horizontal axis of symmetry. Therefore the correct option is C.
In part 2, figure A and D have vertical axis of symmetry. Therefore the correct options are AD.
You might be interested in
Answer:
x = ± - 3
Explanation:
I'm assuming you want the solutions to that equation, so here goes! (If not, please comment.)
(x-3)(x+9)=27
Let's FOIL this all out and expand. (Remember: First, Outer, Inner, Last.)
x^2 + 9x - 3x - 27
(first+ inner + outer + last)
x^2 + 9x - 3x - 27 = 27
Combine like terms, and add 27 to both sides.
x^2 + 6x - 27 + 27 = 27 + 27
x^2 + 6x = 54
Let's complete the square, because factoring doesn't work, and because it's good practice.
x^2 + 6x + ___ = 54 + ____
In the blank we will put b/2 ^2 = 6/2 ^2 = 3^2 = 9 to complete the square.
x^2 + 6x + 9 = 54 + 9
Now we've got a perfect square factor:
(x + 3)^2 = 63
sqrt(x+3)^2 =
x + 3 = ±
x = ± - 3