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Andru [333]
3 years ago
8

HELP GEOMTRY TEST !!!

Mathematics
1 answer:
Inessa05 [86]3 years ago
5 0

Answer:

B

Step-by-step explanation

I think

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SBC is an isosceles triangle with main vertex S.
stira [4]

Answer + Step-by-step explanation:

1) D be the symmetric of B with respect to C then CD = BC

A the symmetric of C with respect to B then AB = BC

We obtain :

CD = BC

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Then AB = CD

2) m∠SBA = 180 - SBC = 180 - SCB = m∠SCD

3) we have :

BA = CD

BS = CS

m∠SBA = m∠SCD

Then

the triangles SBA and SCD are congruent

4)

the triangles SBA and SCD are congruent Then SA = SD

Therefore SAD is an isosceles triangle.

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What is an simplified expression for 8a-(-3-5a)-2a?
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Answer:

The answer is 11a+3

Step-by-step explanation:

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