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Butoxors [25]
3 years ago
5

Which congruence theorem can be used to prove △BDA ≅ △DBC? HL SAS AAS SSS

Mathematics
2 answers:
mario62 [17]3 years ago
8 0
HL, when you have 2 right triangles and their hypotenuses are congruent you are able to say HL
statuscvo [17]3 years ago
8 0

Answer:

A. Hypotenuse-leg (HL) congruence.

Step-by-step explanation:

We have been given a diagram of two right triangles and we are asked to determine the right congruence theorem that will prove △BDA ≅ △DBC.

Since we know that the hypotenuse-leg theorem states that if the hypotenuse and one leg of a right triangle are congruent to hypotenuse and corresponding leg of another right triangle, then the triangles are congruent.  

We can see from our diagram that hypotenuse(AB) of △BDA equals to hypotenuse (CD) of △DBC.  

We can see that triangles BDA and DBC share a common side DB.

Using Pythagorean theorem we will get,

CD^{2}=DB^{2}+BC^{2}...(1)  

AB^{2}=DB^{2}+AD^{2}...(2)

We have been given that CD=AB, Upon using this information we will get,

DB^{2}+BC^{2}=DB^{2}+AD^{2}

Upon subtracting DB^{2} from both sides of our equation we will get,

BC^{2}=AD^{2}

BC=AD

Therefore, by HL congruence △BDA ≅ △DBC.



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