Question

seg AB the diameter of a circle C is the point on the circumference is that in triangle ABC angle B is less 10 degree than angle A.find the measures of all angles of triangle ABC
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Answer 1

Answer and step-by-step explanation in attachment.

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Answer 2

As we know diameter substend 90° on circle.

according angle C is 90°.

let the angle A be x

so, angle B is x-10

we know the sum of all angle of a triangle is 180°.

angle A+ angleB+ angle C=180°

x+x-10°+ 90°= 180°

or 2x+80°=180°

or 2x = 180°- 80°

or x= 100°/2

or x= 50°

angle A = 50°

angle B = 50°-10°=40°

angle C = 90°