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Question

If two angles of a triangle are 90, 20, then what is the third angle?

A
60
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B
70
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C
90
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D
80
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Solution

The correct option is B 70
In a Euclidean space, the sum of measures of these three angles of anytriangle is invariably equal to the straight angle, also expressed as 180o
Let, the third angle be x
180=90+20+x
x=180110
x=70o.

594642_442603_ans_87fe3b41b9284716abb2c3c636a9c3c0.png

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