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love history [14]

2 years ago

8

Which lines best approximate the directrices of the ellipse? Round to the nearest tenth.

1 answer:

Mrrafil [7]2 years ago

6 0

C aka y = -4.6 and y = 4.6

Step-by-step explanation:

i just took the unit review test on edg. :)

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1/2(7)(4)

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Ksivusya [100]

1. $m\angle BAC=m\angle CAD,\ m\angle ACB=m\angle ADC=90^{\circ}$ , then $m\angle ABC=m\angle ACD$ and triangles ADC and ACB are similar by AAA theorem.

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3. Knowing lengths you could state that $\dfrac{b}{c}= \dfrac{e}{b}$ .

4. This ratio is equivalent to $b^2=ce$ .

5. $m\angle ABC=m\angle CBD,\ m\angle ACB=m\angle CDB=90^{\circ}$ , then $m\angle BAC=m\angle BCD$ and triangles BDC and BCA are similar by AAA theorem.

6. The ratio of the corresponding sides of similar triangles is constant, so

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