Let us first define Hypotenuse Leg (HL) congruence theorem:
<em>If the hypotenuse and one leg of a right angle are congruent to the hypotenuse and one leg of the another triangle, then the triangles are congruent.</em>
Given ACB and DFE are right triangles.
To prove ΔACB ≅ ΔDFE:
In ΔACB and ΔDFE,
AC ≅ DF (one side)
∠ACB ≅ ∠DFE (right angles)
AB ≅ DE (hypotenuse)
∴ ΔACB ≅ ΔDFE by HL theorem.
Answer:
x = 14
Step-by-step explanation:

Either 1 or 3 - 1 is all positive and 3 is all negative
Answer:
2(x-1)(x+1)
Step-by-step explanation:
x2x-2
=2(x^2-1)
=2(x-1)(x+1)
Answer:
p=1, q=5. (1, 5).
Step-by-step explanation:
8p+7q=43
2p-7=-q
------------------
q=-2p+7=7-2p
8p+7(7-2p)=43
8p+49-14p=43
8p-14p=43-49
-6p=-6
6p=6
p=6/6=1
2(1)-7=-q
2-7=-5=-q
q=5