Which transformation of Figure A results in Figure A'?

a reflection across the y-axis

a reflection across the x-axis

a clockwise rotation of 90° about the origin

a translation 12 units right and 2 units down.
A graph with two triangles on it. One triangle, A, is formed between coordinates begin ordered pair -8, -4 end ordered pair, begin ordered pair -4, -5 ends ordered pair, and begin ordered pair -6, -3 end ordered pair. The other triangle, A1, is formed between coordinates begin ordered pair 4, -6 end ordered pair, begin ordered pair 6, -5 ends ordered pair, and begin ordered pair 8, -7 end ordered pair.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc