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leonid [27]
2 years ago
6

Explain and find CD please

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
4 0

Answer:

CD \approx5.29

Step-by-step explanation:

By geometric mean theorem:

CD=\sqrt {AD\times BD}  \\  \\ CD=\sqrt {7\times 4}  \\  \\ CD=\sqrt {28}  \\  \\ CD=5.29150262 \\  \\ CD \approx5.29

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Answer:

a). m∠AED = 70°

b). x = 10°

Step-by-step explanation:

a). Quadrilateral ABDE is a cyclic quadrilateral.

Therefore, by the theorem of cyclic quadrilateral,

Sum of either pair of opposite angle is 180°

m(∠AED) + m(∠ABD) = 180°

m(∠AED) = 180° - 110°

m(∠AED) = 70°

Since, ∠AED ≅ ∠EAD

Therefore, m∠AED = m∠EAD = 70°

b). By triangle sum theorem in ΔABD,

m∠ABD + m∠BDA + m∠DAB = 180°

110° + 40° + m∠DAB = 180°

m∠DAB = 180° - 150°

m∠DAB = 30°

m∠BAE = m∠EAD + m∠BAD

              = 70° + 30° = 100°

By angle sum theorem in ΔACE,

m∠EAC + m∠AEC + m∠ACE = 180°

100° + 70° + x° = 180°

x = 180° - 170°

x = 10°

4 0
3 years ago
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Brut [27]

Answer:

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Step-by-step explanation:

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Answer:

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5y = 2x - 3

Divide both sides by 5

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