In the first blank, state the postulate or theorem that can be used to conclude that the triangles are congruent. Use the acronym with no spaces, e.g. SSS, SAS, ASA, HL,
AAS.

In the second blank, finish the congruence statement: GFI = Your
answer should be only 3 letters.

y= sqrt(200)

Step-by-step explanation:

It is given that the peak of the triangle is also a 90 degree angle, therefore we can safely assume that you have a 45-45-90 triangle. Since it is a 45-45-90 triangle, we can also assume that the height of the triangle is 10. using pythagorean theorem, we take the sqrt((10)^2 + (10)^2) which gives us an answer of sqrt(200) or 10sqrt(2)