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Free_Kalibri [48]
3 years ago
15

(Total for Question is 4 marks)

Mathematics
1 answer:
Alexxx [7]3 years ago
7 0

Answer:

I call this angle chasing or angle hunting. The answer is 60°.

Step-by-step explanation:

m \: bad = 25 \\ m \: bcd = 70 \: therefore \\ m \: adc \:  = 180 - (70 + 25) = 85

since ∆ BAD is an isosceles triangle m BDA = m BAD = 25°

m \: adc \:  - m \: adb = 85 - 25 = 60 \\ x = 60 \: degrees

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