3 years ago

Please answer fast i need it

Mathematics

1 answer:

elena-s [515]3 years ago

4 0

Answer:

AB = 2.625

Step-by-step explanation:

BC is an angle bisector and divides the opposite sides into segments that are proportional to the other 2 sides , that is

$\frac{CA}{CD}$ = $\frac{AB}{BD}$ , that ia

$\frac{6}{10}$ = $\frac{AB}{7-AB}$ ( cross- multiply )

10 AB = 6(7 - AB) ← distribute

10 AB = 42 - 6 AB ( add 6 AB to both sides )

16 AB = 42 ( divide both sides by 16 )

AB = 2.625

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Juliette [100K]

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4 years ago

Find the size of the marked angles

morpeh [17]

Answer:

b = 55°

c = 35°

Step-by-step explanation:

b° = 180° - (85°+40°) = 180° - 125° = 55°

c° = 180° - (b°+90°) = 180° - (55°+90°) = 180° - 145° = 35°

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3 years ago