In the figure below not drawn to scale. DC is a tangent to the circle. DC = 6cm, AB = 5cm. Calculate BC. (3mks)

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ValentiGoClimb asked Jul 2, 2023

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In the figure below not drawn to scale. DC is a tangent to the circle. DC = 6cm, AB = 5cm. Calculate BC. (3mks)

In the figure below not drawn to scale. DC is a tangent to the circle. DC = 6cm, AB-example-1

Mathematics
high-school

ValentiGoClimb asked Jul 2, 2023

by ValentiGoClimb

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19 votes

Answer:

Explanation:

DA²= CB×CA

6²= y×(y+5)

36=y²+5y

y²+5y-36=0

x1+x2=-5

x1×x2=36

x1=4

x2=-9

x must be positive, then answer is 4

chek: 4×9=36

Ben Davini answered Jul 7, 2023

by Ben Davini

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