Number one please. If u will teach it will be very kind for me.
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AB=AC , ∴ ΔABC is a right angled isosceles triangle
so ,∠A=∠B
180°-90°=90°
Since, ∠A=∠B ,90/2=45°
angles 45° , 45°
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Given, ABC is a right angled triangle
in which<A=90
Since, we know that sum of all angles of a triangle is 180°
And
One angle measure 90°
So, other angles measure 45° and 45°
in which<A=90
Since, we know that sum of all angles of a triangle is 180°
And
One angle measure 90°
So, other angles measure 45° and 45°
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