Triangles

In a triangle, the sum of the interior angles is always:

Which of the following sets of side lengths can form a triangle?

If two sides of a triangle are equal, then the triangle is called:

In triangle ABC, if AB = AC and angle B = 40°, what is the measure of angle C?

Which of the following is NOT a valid criterion for congruence of two triangles?

The length of the median drawn from the right angle vertex in a right-angled triangle is:

In triangle PQR, if PQ = 7 cm, QR = 24 cm, and PR = 25 cm, what type of triangle is it?

If the sides of a triangle are in the ratio 3:4:5, then the triangle is:

The area of an equilateral triangle with side length 'a' is given by:

In triangle ABC, if angle A = 60°, angle B = 50°, and side BC = 10 cm, what is the length of side AC? (Use sine rule)