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alekssr [168]
2 years ago
7

A) BCD is a straight line.

Mathematics
1 answer:
otez555 [7]2 years ago
3 0

Answer:

x = 46°

Step-by-step explanation:

Since Δ ABC is equilateral then interior angles = 60°

Since CE = DE then Δ CDE is isosceles and the base angles are congruent, so

∠ ECD = \frac{180-32}{2} = \frac{148}{2} = 74°

BCD is a straight line, then the 3 angles on it sum to 180°, that is

60° + 74° + x = 180°

134° + x = 180° ( subtract 134° from both sides )

x = 46°

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