Question

The given figure, shows an isosceles triangle with angle ABC = 90°, the measure of angle BAC is:

Options

• 30°

• 45°

• 60°

• 40°

Answer 1

45°

Explanation:

Since triangle ABC is an isosceles right-angled triangle with ∠ABC = 90°, the two base angles ∠BAC and ∠BCA are equal. Therefore, each angle is \[\frac{180^\circ - 90^\circ}{2} = 45^\circ\].