Question

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Answer 1

Answer:

Angle adc is 90 cause any triangle made in a semicircle will have 90degree so tht leave s us wih angle acd which is 180-(90+20)= 70

Step-by-step explanation:

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Answer 2

Solution :

Given

∠A = 20°

∠D = 90°

then

as per rule ,

the sum of three angles of a ∆ is 180°

then ,

∠A + ∠D + ∠C = 180°

$∠C = 180 - 20 - 90$

$∠C = 180 - 110$

$∠C = 70°$

Hence , ∠C = 70°

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