Question

In a triangle ABC, Angle 35and angle C = 55 degree . Which of the following is true​

Answer 1

Answer:

Sum of the angles in a triangle is 180

According to the sum

Angle A+Angle B+Angle C=180

Angle A=180-35-55

Angle A=90 degree

Hope this answer helps you

Answer 2

Answer:

Given that ∠B = 35°, ∠C = 55°

Then, ∠A =?

We know that sum of the angle of three sides of triangle is equal to 180o.

= ∠A + ∠B + ∠C = 180°

= ∠A + 35°+ 55o = 180°

= ∠A + 90° = 180°

= ∠A = 180 – 90

= ∠A = 90°

Also, we know that side opposite to the right angle is the hypotenuse.

∴ BC2 = AB2 + AC2

Hence, (iii) is true

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