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2 years ago

Help. I have no idea how to do this

Mathematics

1 answer:

mr_godi [17]2 years ago

7 0

Mhm.... Word problems.. So! Angle Side Angle :) proving that 2 triangles are equal.
You need to prove that DC is equal to BA. Now....
DB == AC.
which you can subtract BC from both sides!
DB-BC = AC-CB. leaving you with DC= AB

Now by Side Angle Side, The angles are =, 2 sides are equal, means the 2 triangles are equal :) If the triangles are equal, the 2 remaining sides must be equal

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$2 \sqrt{42} +7 \sqrt{2}- 6- \sqrt{21}$

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The given product is:

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We expand using the distributive property to obtain:

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