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90⁰, triangle
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20 . Sum Of 2 Angles :- 90 ⁰
Third Angle :- ?.?
Sum Of Three Angles Of A Triangle :-
x⁰ + x⁰ + x⁰ = 180 ⁰
= 180 ⁰ - 90 ⁰ = x
= 90 ⁰ = x
Hence , x = 90 ⁰ { b }
21 . { a } Triangle
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