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loris [4]
2 years ago
8

Find the value of x in the diagram shown below.

Mathematics
2 answers:
koban [17]2 years ago
5 0

Answer:

a) <u>∡ADC = 270°</u>

b) <u>∠DAE = 38°</u>

Step-by-step explanation:

Using Inscribed Angle Theorem :

  • ∡ADC = 2 x ∠ABC
  • ∡ADC = 2 x 135°
  • <u>∡ADC = 270°</u>

Similarly :

  • ∠DAE = 1/2 x ∡DE
  • ∠DAE = 1/2 x 76°
  • <u>∠DAE = 38°</u>
Sloan [31]2 years ago
5 0

Answer:

  a) arc ADC = 270°

  b) angle DAE = 38°

Step-by-step explanation:

An inscribed angle is half the measure of the arc it subtends. The converse of this is that the arc is twice the measure of the inscribed angle that subtends it.

__

<h3>a)</h3>

Arc ADC is twice the measure of inscribed angle ABC, so is ...

  Arc ADC = 2 × 135° = 270°

__

<h3>b)</h3>

Angle DAE is half the measure of the arc it subtends, so is ...

  Angle DAE = 1/2 × 76° = 38°

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