How can we find reflection if there is point of image

If you are reflecting over the x-axis, switch the sign of y in your coordinate point.

ex. (a,b) reflected over x would be (a,-b)

If you are reflecting over the y-axis, switch the sign of x in your coordinate point.

ex. (a,b) reflected over y would be (-a,b)

Step-by-step explanation:

step-by-step explanation:

it's 15

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.